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PK �#]����� � abc.pynu �[��� """Abstract base classes related to import.""" from . import _bootstrap_external from . import machinery try: import _frozen_importlib except ImportError as exc: if exc.name != '_frozen_importlib': raise _frozen_importlib = None try: import _frozen_importlib_external except ImportError: _frozen_importlib_external = _bootstrap_external from ._abc import Loader import abc import warnings from .resources import abc as _resources_abc __all__ = [ 'Loader', 'MetaPathFinder', 'PathEntryFinder', 'ResourceLoader', 'InspectLoader', 'ExecutionLoader', 'FileLoader', 'SourceLoader', ] def __getattr__(name): """ For backwards compatibility, continue to make names from _resources_abc available through this module. #93963 """ if name in _resources_abc.__all__: obj = getattr(_resources_abc, name) warnings._deprecated(f"{__name__}.{name}", remove=(3, 14)) globals()[name] = obj return obj raise AttributeError(f'module {__name__!r} has no attribute {name!r}') def _register(abstract_cls, *classes): for cls in classes: abstract_cls.register(cls) if _frozen_importlib is not None: try: frozen_cls = getattr(_frozen_importlib, cls.__name__) except AttributeError: frozen_cls = getattr(_frozen_importlib_external, cls.__name__) abstract_cls.register(frozen_cls) class MetaPathFinder(metaclass=abc.ABCMeta): """Abstract base class for import finders on sys.meta_path.""" # We don't define find_spec() here since that would break # hasattr checks we do to support backward compatibility. def invalidate_caches(self): """An optional method for clearing the finder's cache, if any. This method is used by importlib.invalidate_caches(). """ _register(MetaPathFinder, machinery.BuiltinImporter, machinery.FrozenImporter, machinery.PathFinder, machinery.WindowsRegistryFinder) class PathEntryFinder(metaclass=abc.ABCMeta): """Abstract base class for path entry finders used by PathFinder.""" def invalidate_caches(self): """An optional method for clearing the finder's cache, if any. This method is used by PathFinder.invalidate_caches(). """ _register(PathEntryFinder, machinery.FileFinder) class ResourceLoader(Loader): """Abstract base class for loaders which can return data from their back-end storage. This ABC represents one of the optional protocols specified by PEP 302. """ @abc.abstractmethod def get_data(self, path): """Abstract method which when implemented should return the bytes for the specified path. The path must be a str.""" raise OSError class InspectLoader(Loader): """Abstract base class for loaders which support inspection about the modules they can load. This ABC represents one of the optional protocols specified by PEP 302. """ def is_package(self, fullname): """Optional method which when implemented should return whether the module is a package. The fullname is a str. Returns a bool. Raises ImportError if the module cannot be found. """ raise ImportError def get_code(self, fullname): """Method which returns the code object for the module. The fullname is a str. Returns a types.CodeType if possible, else returns None if a code object does not make sense (e.g. built-in module). Raises ImportError if the module cannot be found. """ source = self.get_source(fullname) if source is None: return None return self.source_to_code(source) @abc.abstractmethod def get_source(self, fullname): """Abstract method which should return the source code for the module. The fullname is a str. Returns a str. Raises ImportError if the module cannot be found. """ raise ImportError @staticmethod def source_to_code(data, path='<string>'): """Compile 'data' into a code object. The 'data' argument can be anything that compile() can handle. The'path' argument should be where the data was retrieved (when applicable).""" return compile(data, path, 'exec', dont_inherit=True) exec_module = _bootstrap_external._LoaderBasics.exec_module load_module = _bootstrap_external._LoaderBasics.load_module _register(InspectLoader, machinery.BuiltinImporter, machinery.FrozenImporter, machinery.NamespaceLoader) class ExecutionLoader(InspectLoader): """Abstract base class for loaders that wish to support the execution of modules as scripts. This ABC represents one of the optional protocols specified in PEP 302. """ @abc.abstractmethod def get_filename(self, fullname): """Abstract method which should return the value that __file__ is to be set to. Raises ImportError if the module cannot be found. """ raise ImportError def get_code(self, fullname): """Method to return the code object for fullname. Should return None if not applicable (e.g. built-in module). Raise ImportError if the module cannot be found. """ source = self.get_source(fullname) if source is None: return None try: path = self.get_filename(fullname) except ImportError: return self.source_to_code(source) else: return self.source_to_code(source, path) _register(ExecutionLoader, machinery.ExtensionFileLoader) class FileLoader(_bootstrap_external.FileLoader, ResourceLoader, ExecutionLoader): """Abstract base class partially implementing the ResourceLoader and ExecutionLoader ABCs.""" _register(FileLoader, machinery.SourceFileLoader, machinery.SourcelessFileLoader) class SourceLoader(_bootstrap_external.SourceLoader, ResourceLoader, ExecutionLoader): """Abstract base class for loading source code (and optionally any corresponding bytecode). To support loading from source code, the abstractmethods inherited from ResourceLoader and ExecutionLoader need to be implemented. To also support loading from bytecode, the optional methods specified directly by this ABC is required. Inherited abstractmethods not implemented in this ABC: * ResourceLoader.get_data * ExecutionLoader.get_filename """ def path_mtime(self, path): """Return the (int) modification time for the path (str).""" if self.path_stats.__func__ is SourceLoader.path_stats: raise OSError return int(self.path_stats(path)['mtime']) def path_stats(self, path): """Return a metadata dict for the source pointed to by the path (str). Possible keys: - 'mtime' (mandatory) is the numeric timestamp of last source code modification; - 'size' (optional) is the size in bytes of the source code. """ if self.path_mtime.__func__ is SourceLoader.path_mtime: raise OSError return {'mtime': self.path_mtime(path)} def set_data(self, path, data): """Write the bytes to the path (if possible). Accepts a str path and data as bytes. Any needed intermediary directories are to be created. If for some reason the file cannot be written because of permissions, fail silently. """ _register(SourceLoader, machinery.SourceFileLoader) PK �#]<�p p machinery.pynu �[��� """The machinery of importlib: finders, loaders, hooks, etc.""" from ._bootstrap import ModuleSpec from ._bootstrap import BuiltinImporter from ._bootstrap import FrozenImporter from ._bootstrap_external import (SOURCE_SUFFIXES, DEBUG_BYTECODE_SUFFIXES, OPTIMIZED_BYTECODE_SUFFIXES, BYTECODE_SUFFIXES, EXTENSION_SUFFIXES) from ._bootstrap_external import WindowsRegistryFinder from ._bootstrap_external import PathFinder from ._bootstrap_external import FileFinder from ._bootstrap_external import SourceFileLoader from ._bootstrap_external import SourcelessFileLoader from ._bootstrap_external import ExtensionFileLoader from ._bootstrap_external import NamespaceLoader def all_suffixes(): """Returns a list of all recognized module suffixes for this process""" return SOURCE_SUFFIXES + BYTECODE_SUFFIXES + EXTENSION_SUFFIXES PK �#]����G G readers.pynu �[��� """ Compatibility shim for .resources.readers as found on Python 3.10. Consumers that can rely on Python 3.11 should use the other module directly. """ from .resources.readers import ( FileReader, ZipReader, MultiplexedPath, NamespaceReader, ) __all__ = ['FileReader', 'ZipReader', 'MultiplexedPath', 'NamespaceReader'] PK �#]l~ �* �* util.pynu �[��� """Utility code for constructing importers, etc.""" from ._abc import Loader from ._bootstrap import module_from_spec from ._bootstrap import _resolve_name from ._bootstrap import spec_from_loader from ._bootstrap import _find_spec from ._bootstrap_external import MAGIC_NUMBER from ._bootstrap_external import _RAW_MAGIC_NUMBER from ._bootstrap_external import cache_from_source from ._bootstrap_external import decode_source from ._bootstrap_external import source_from_cache from ._bootstrap_external import spec_from_file_location import _imp import sys import types def source_hash(source_bytes): "Return the hash of *source_bytes* as used in hash-based pyc files." return _imp.source_hash(_RAW_MAGIC_NUMBER, source_bytes) def resolve_name(name, package): """Resolve a relative module name to an absolute one.""" if not name.startswith('.'): return name elif not package: raise ImportError(f'no package specified for {repr(name)} ' '(required for relative module names)') level = 0 for character in name: if character != '.': break level += 1 return _resolve_name(name[level:], package, level) def _find_spec_from_path(name, path=None): """Return the spec for the specified module. First, sys.modules is checked to see if the module was already imported. If so, then sys.modules[name].__spec__ is returned. If that happens to be set to None, then ValueError is raised. If the module is not in sys.modules, then sys.meta_path is searched for a suitable spec with the value of 'path' given to the finders. None is returned if no spec could be found. Dotted names do not have their parent packages implicitly imported. You will most likely need to explicitly import all parent packages in the proper order for a submodule to get the correct spec. """ if name not in sys.modules: return _find_spec(name, path) else: module = sys.modules[name] if module is None: return None try: spec = module.__spec__ except AttributeError: raise ValueError(f'{name}.__spec__ is not set') from None else: if spec is None: raise ValueError(f'{name}.__spec__ is None') return spec def find_spec(name, package=None): """Return the spec for the specified module. First, sys.modules is checked to see if the module was already imported. If so, then sys.modules[name].__spec__ is returned. If that happens to be set to None, then ValueError is raised. If the module is not in sys.modules, then sys.meta_path is searched for a suitable spec with the value of 'path' given to the finders. None is returned if no spec could be found. If the name is for submodule (contains a dot), the parent module is automatically imported. The name and package arguments work the same as importlib.import_module(). In other words, relative module names (with leading dots) work. """ fullname = resolve_name(name, package) if name.startswith('.') else name if fullname not in sys.modules: parent_name = fullname.rpartition('.')[0] if parent_name: parent = __import__(parent_name, fromlist=['__path__']) try: parent_path = parent.__path__ except AttributeError as e: raise ModuleNotFoundError( f"__path__ attribute not found on {parent_name!r} " f"while trying to find {fullname!r}", name=fullname) from e else: parent_path = None return _find_spec(fullname, parent_path) else: module = sys.modules[fullname] if module is None: return None try: spec = module.__spec__ except AttributeError: raise ValueError(f'{name}.__spec__ is not set') from None else: if spec is None: raise ValueError(f'{name}.__spec__ is None') return spec # Normally we would use contextlib.contextmanager. However, this module # is imported by runpy, which means we want to avoid any unnecessary # dependencies. Thus we use a class. class _incompatible_extension_module_restrictions: """A context manager that can temporarily skip the compatibility check. NOTE: This function is meant to accommodate an unusual case; one which is likely to eventually go away. There's is a pretty good chance this is not what you were looking for. WARNING: Using this function to disable the check can lead to unexpected behavior and even crashes. It should only be used during extension module development. If "disable_check" is True then the compatibility check will not happen while the context manager is active. Otherwise the check *will* happen. Normally, extensions that do not support multiple interpreters may not be imported in a subinterpreter. That implies modules that do not implement multi-phase init or that explicitly of out. Likewise for modules import in a subinterpeter with its own GIL when the extension does not support a per-interpreter GIL. This implies the module does not have a Py_mod_multiple_interpreters slot set to Py_MOD_PER_INTERPRETER_GIL_SUPPORTED. In both cases, this context manager may be used to temporarily disable the check for compatible extension modules. You can get the same effect as this function by implementing the basic interface of multi-phase init (PEP 489) and lying about support for multiple interpreters (or per-interpreter GIL). """ def __init__(self, *, disable_check): self.disable_check = bool(disable_check) def __enter__(self): self.old = _imp._override_multi_interp_extensions_check(self.override) return self def __exit__(self, *args): old = self.old del self.old _imp._override_multi_interp_extensions_check(old) @property def override(self): return -1 if self.disable_check else 1 class _LazyModule(types.ModuleType): """A subclass of the module type which triggers loading upon attribute access.""" def __getattribute__(self, attr): """Trigger the load of the module and return the attribute.""" __spec__ = object.__getattribute__(self, '__spec__') loader_state = __spec__.loader_state with loader_state['lock']: # Only the first thread to get the lock should trigger the load # and reset the module's class. The rest can now getattr(). if object.__getattribute__(self, '__class__') is _LazyModule: # Reentrant calls from the same thread must be allowed to proceed without # triggering the load again. # exec_module() and self-referential imports are the primary ways this can # happen, but in any case we must return something to avoid deadlock. if loader_state['is_loading']: return object.__getattribute__(self, attr) loader_state['is_loading'] = True __dict__ = object.__getattribute__(self, '__dict__') # All module metadata must be gathered from __spec__ in order to avoid # using mutated values. # Get the original name to make sure no object substitution occurred # in sys.modules. original_name = __spec__.name # Figure out exactly what attributes were mutated between the creation # of the module and now. attrs_then = loader_state['__dict__'] attrs_now = __dict__ attrs_updated = {} for key, value in attrs_now.items(): # Code that set an attribute may have kept a reference to the # assigned object, making identity more important than equality. if key not in attrs_then: attrs_updated[key] = value elif id(attrs_now[key]) != id(attrs_then[key]): attrs_updated[key] = value __spec__.loader.exec_module(self) # If exec_module() was used directly there is no guarantee the module # object was put into sys.modules. if original_name in sys.modules: if id(self) != id(sys.modules[original_name]): raise ValueError(f"module object for {original_name!r} " "substituted in sys.modules during a lazy " "load") # Update after loading since that's what would happen in an eager # loading situation. __dict__.update(attrs_updated) # Finally, stop triggering this method. self.__class__ = types.ModuleType return getattr(self, attr) def __delattr__(self, attr): """Trigger the load and then perform the deletion.""" # To trigger the load and raise an exception if the attribute # doesn't exist. self.__getattribute__(attr) delattr(self, attr) class LazyLoader(Loader): """A loader that creates a module which defers loading until attribute access.""" @staticmethod def __check_eager_loader(loader): if not hasattr(loader, 'exec_module'): raise TypeError('loader must define exec_module()') @classmethod def factory(cls, loader): """Construct a callable which returns the eager loader made lazy.""" cls.__check_eager_loader(loader) return lambda *args, **kwargs: cls(loader(*args, **kwargs)) def __init__(self, loader): self.__check_eager_loader(loader) self.loader = loader def create_module(self, spec): return self.loader.create_module(spec) def exec_module(self, module): """Make the module load lazily.""" # Threading is only needed for lazy loading, and importlib.util can # be pulled in at interpreter startup, so defer until needed. import threading module.__spec__.loader = self.loader module.__loader__ = self.loader # Don't need to worry about deep-copying as trying to set an attribute # on an object would have triggered the load, # e.g. ``module.__spec__.loader = None`` would trigger a load from # trying to access module.__spec__. loader_state = {} loader_state['__dict__'] = module.__dict__.copy() loader_state['__class__'] = module.__class__ loader_state['lock'] = threading.RLock() loader_state['is_loading'] = False module.__spec__.loader_state = loader_state module.__class__ = _LazyModule PK �#]Qu0�� �� _bootstrap.pynu �[��� """Core implementation of import. This module is NOT meant to be directly imported! It has been designed such that it can be bootstrapped into Python as the implementation of import. As such it requires the injection of specific modules and attributes in order to work. One should use importlib as the public-facing version of this module. """ # # IMPORTANT: Whenever making changes to this module, be sure to run a top-level # `make regen-importlib` followed by `make` in order to get the frozen version # of the module updated. Not doing so will result in the Makefile to fail for # all others who don't have a ./python around to freeze the module # in the early stages of compilation. # # See importlib._setup() for what is injected into the global namespace. # When editing this code be aware that code executed at import time CANNOT # reference any injected objects! This includes not only global code but also # anything specified at the class level. def _object_name(obj): try: return obj.__qualname__ except AttributeError: return type(obj).__qualname__ # Bootstrap-related code ###################################################### # Modules injected manually by _setup() _thread = None _warnings = None _weakref = None # Import done by _install_external_importers() _bootstrap_external = None def _wrap(new, old): """Simple substitute for functools.update_wrapper.""" for replace in ['__module__', '__name__', '__qualname__', '__doc__']: if hasattr(old, replace): setattr(new, replace, getattr(old, replace)) new.__dict__.update(old.__dict__) def _new_module(name): return type(sys)(name) # Module-level locking ######################################################## # For a list that can have a weakref to it. class _List(list): pass # Copied from weakref.py with some simplifications and modifications unique to # bootstrapping importlib. Many methods were simply deleting for simplicity, so if they # are needed in the future they may work if simply copied back in. class _WeakValueDictionary: def __init__(self): self_weakref = _weakref.ref(self) # Inlined to avoid issues with inheriting from _weakref.ref before _weakref is # set by _setup(). Since there's only one instance of this class, this is # not expensive. class KeyedRef(_weakref.ref): __slots__ = "key", def __new__(type, ob, key): self = super().__new__(type, ob, type.remove) self.key = key return self def __init__(self, ob, key): super().__init__(ob, self.remove) @staticmethod def remove(wr): nonlocal self_weakref self = self_weakref() if self is not None: if self._iterating: self._pending_removals.append(wr.key) else: _weakref._remove_dead_weakref(self.data, wr.key) self._KeyedRef = KeyedRef self.clear() def clear(self): self._pending_removals = [] self._iterating = set() self.data = {} def _commit_removals(self): pop = self._pending_removals.pop d = self.data while True: try: key = pop() except IndexError: return _weakref._remove_dead_weakref(d, key) def get(self, key, default=None): if self._pending_removals: self._commit_removals() try: wr = self.data[key] except KeyError: return default else: if (o := wr()) is None: return default else: return o def setdefault(self, key, default=None): try: o = self.data[key]() except KeyError: o = None if o is None: if self._pending_removals: self._commit_removals() self.data[key] = self._KeyedRef(default, key) return default else: return o # A dict mapping module names to weakrefs of _ModuleLock instances. # Dictionary protected by the global import lock. _module_locks = {} # A dict mapping thread IDs to weakref'ed lists of _ModuleLock instances. # This maps a thread to the module locks it is blocking on acquiring. The # values are lists because a single thread could perform a re-entrant import # and be "in the process" of blocking on locks for more than one module. A # thread can be "in the process" because a thread cannot actually block on # acquiring more than one lock but it can have set up bookkeeping that reflects # that it intends to block on acquiring more than one lock. # # The dictionary uses a WeakValueDictionary to avoid keeping unnecessary # lists around, regardless of GC runs. This way there's no memory leak if # the list is no longer needed (GH-106176). _blocking_on = None class _BlockingOnManager: """A context manager responsible to updating ``_blocking_on``.""" def __init__(self, thread_id, lock): self.thread_id = thread_id self.lock = lock def __enter__(self): """Mark the running thread as waiting for self.lock. via _blocking_on.""" # Interactions with _blocking_on are *not* protected by the global # import lock here because each thread only touches the state that it # owns (state keyed on its thread id). The global import lock is # re-entrant (i.e., a single thread may take it more than once) so it # wouldn't help us be correct in the face of re-entrancy either. self.blocked_on = _blocking_on.setdefault(self.thread_id, _List()) self.blocked_on.append(self.lock) def __exit__(self, *args, **kwargs): """Remove self.lock from this thread's _blocking_on list.""" self.blocked_on.remove(self.lock) class _DeadlockError(RuntimeError): pass def _has_deadlocked(target_id, *, seen_ids, candidate_ids, blocking_on): """Check if 'target_id' is holding the same lock as another thread(s). The search within 'blocking_on' starts with the threads listed in 'candidate_ids'. 'seen_ids' contains any threads that are considered already traversed in the search. Keyword arguments: target_id -- The thread id to try to reach. seen_ids -- A set of threads that have already been visited. candidate_ids -- The thread ids from which to begin. blocking_on -- A dict representing the thread/blocking-on graph. This may be the same object as the global '_blocking_on' but it is a parameter to reduce the impact that global mutable state has on the result of this function. """ if target_id in candidate_ids: # If we have already reached the target_id, we're done - signal that it # is reachable. return True # Otherwise, try to reach the target_id from each of the given candidate_ids. for tid in candidate_ids: if not (candidate_blocking_on := blocking_on.get(tid)): # There are no edges out from this node, skip it. continue elif tid in seen_ids: # bpo 38091: the chain of tid's we encounter here eventually leads # to a fixed point or a cycle, but does not reach target_id. # This means we would not actually deadlock. This can happen if # other threads are at the beginning of acquire() below. return False seen_ids.add(tid) # Follow the edges out from this thread. edges = [lock.owner for lock in candidate_blocking_on] if _has_deadlocked(target_id, seen_ids=seen_ids, candidate_ids=edges, blocking_on=blocking_on): return True return False class _ModuleLock: """A recursive lock implementation which is able to detect deadlocks (e.g. thread 1 trying to take locks A then B, and thread 2 trying to take locks B then A). """ def __init__(self, name): # Create an RLock for protecting the import process for the # corresponding module. Since it is an RLock, a single thread will be # able to take it more than once. This is necessary to support # re-entrancy in the import system that arises from (at least) signal # handlers and the garbage collector. Consider the case of: # # import foo # -> ... # -> importlib._bootstrap._ModuleLock.acquire # -> ... # -> <garbage collector> # -> __del__ # -> import foo # -> ... # -> importlib._bootstrap._ModuleLock.acquire # -> _BlockingOnManager.__enter__ # # If a different thread than the running one holds the lock then the # thread will have to block on taking the lock, which is what we want # for thread safety. self.lock = _thread.RLock() self.wakeup = _thread.allocate_lock() # The name of the module for which this is a lock. self.name = name # Can end up being set to None if this lock is not owned by any thread # or the thread identifier for the owning thread. self.owner = None # Represent the number of times the owning thread has acquired this lock # via a list of True. This supports RLock-like ("re-entrant lock") # behavior, necessary in case a single thread is following a circular # import dependency and needs to take the lock for a single module # more than once. # # Counts are represented as a list of True because list.append(True) # and list.pop() are both atomic and thread-safe in CPython and it's hard # to find another primitive with the same properties. self.count = [] # This is a count of the number of threads that are blocking on # self.wakeup.acquire() awaiting to get their turn holding this module # lock. When the module lock is released, if this is greater than # zero, it is decremented and `self.wakeup` is released one time. The # intent is that this will let one other thread make more progress on # acquiring this module lock. This repeats until all the threads have # gotten a turn. # # This is incremented in self.acquire() when a thread notices it is # going to have to wait for another thread to finish. # # See the comment above count for explanation of the representation. self.waiters = [] def has_deadlock(self): # To avoid deadlocks for concurrent or re-entrant circular imports, # look at _blocking_on to see if any threads are blocking # on getting the import lock for any module for which the import lock # is held by this thread. return _has_deadlocked( # Try to find this thread. target_id=_thread.get_ident(), seen_ids=set(), # Start from the thread that holds the import lock for this # module. candidate_ids=[self.owner], # Use the global "blocking on" state. blocking_on=_blocking_on, ) def acquire(self): """ Acquire the module lock. If a potential deadlock is detected, a _DeadlockError is raised. Otherwise, the lock is always acquired and True is returned. """ tid = _thread.get_ident() with _BlockingOnManager(tid, self): while True: # Protect interaction with state on self with a per-module # lock. This makes it safe for more than one thread to try to # acquire the lock for a single module at the same time. with self.lock: if self.count == [] or self.owner == tid: # If the lock for this module is unowned then we can # take the lock immediately and succeed. If the lock # for this module is owned by the running thread then # we can also allow the acquire to succeed. This # supports circular imports (thread T imports module A # which imports module B which imports module A). self.owner = tid self.count.append(True) return True # At this point we know the lock is held (because count != # 0) by another thread (because owner != tid). We'll have # to get in line to take the module lock. # But first, check to see if this thread would create a # deadlock by acquiring this module lock. If it would # then just stop with an error. # # It's not clear who is expected to handle this error. # There is one handler in _lock_unlock_module but many # times this method is called when entering the context # manager _ModuleLockManager instead - so _DeadlockError # will just propagate up to application code. # # This seems to be more than just a hypothetical - # https://stackoverflow.com/questions/59509154 # https://github.com/encode/django-rest-framework/issues/7078 if self.has_deadlock(): raise _DeadlockError(f'deadlock detected by {self!r}') # Check to see if we're going to be able to acquire the # lock. If we are going to have to wait then increment # the waiters so `self.release` will know to unblock us # later on. We do this part non-blockingly so we don't # get stuck here before we increment waiters. We have # this extra acquire call (in addition to the one below, # outside the self.lock context manager) to make sure # self.wakeup is held when the next acquire is called (so # we block). This is probably needlessly complex and we # should just take self.wakeup in the return codepath # above. if self.wakeup.acquire(False): self.waiters.append(None) # Now take the lock in a blocking fashion. This won't # complete until the thread holding this lock # (self.owner) calls self.release. self.wakeup.acquire() # Taking the lock has served its purpose (making us wait), so we can # give it up now. We'll take it w/o blocking again on the # next iteration around this 'while' loop. self.wakeup.release() def release(self): tid = _thread.get_ident() with self.lock: if self.owner != tid: raise RuntimeError('cannot release un-acquired lock') assert len(self.count) > 0 self.count.pop() if not len(self.count): self.owner = None if len(self.waiters) > 0: self.waiters.pop() self.wakeup.release() def __repr__(self): return f'_ModuleLock({self.name!r}) at {id(self)}' class _DummyModuleLock: """A simple _ModuleLock equivalent for Python builds without multi-threading support.""" def __init__(self, name): self.name = name self.count = 0 def acquire(self): self.count += 1 return True def release(self): if self.count == 0: raise RuntimeError('cannot release un-acquired lock') self.count -= 1 def __repr__(self): return f'_DummyModuleLock({self.name!r}) at {id(self)}' class _ModuleLockManager: def __init__(self, name): self._name = name self._lock = None def __enter__(self): self._lock = _get_module_lock(self._name) self._lock.acquire() def __exit__(self, *args, **kwargs): self._lock.release() # The following two functions are for consumption by Python/import.c. def _get_module_lock(name): """Get or create the module lock for a given module name. Acquire/release internally the global import lock to protect _module_locks.""" _imp.acquire_lock() try: try: lock = _module_locks[name]() except KeyError: lock = None if lock is None: if _thread is None: lock = _DummyModuleLock(name) else: lock = _ModuleLock(name) def cb(ref, name=name): _imp.acquire_lock() try: # bpo-31070: Check if another thread created a new lock # after the previous lock was destroyed # but before the weakref callback was called. if _module_locks.get(name) is ref: del _module_locks[name] finally: _imp.release_lock() _module_locks[name] = _weakref.ref(lock, cb) finally: _imp.release_lock() return lock def _lock_unlock_module(name): """Acquires then releases the module lock for a given module name. This is used to ensure a module is completely initialized, in the event it is being imported by another thread. """ lock = _get_module_lock(name) try: lock.acquire() except _DeadlockError: # Concurrent circular import, we'll accept a partially initialized # module object. pass else: lock.release() # Frame stripping magic ############################################### def _call_with_frames_removed(f, *args, **kwds): """remove_importlib_frames in import.c will always remove sequences of importlib frames that end with a call to this function Use it instead of a normal call in places where including the importlib frames introduces unwanted noise into the traceback (e.g. when executing module code) """ return f(*args, **kwds) def _verbose_message(message, *args, verbosity=1): """Print the message to stderr if -v/PYTHONVERBOSE is turned on.""" if sys.flags.verbose >= verbosity: if not message.startswith(('#', 'import ')): message = '# ' + message print(message.format(*args), file=sys.stderr) def _requires_builtin(fxn): """Decorator to verify the named module is built-in.""" def _requires_builtin_wrapper(self, fullname): if fullname not in sys.builtin_module_names: raise ImportError(f'{fullname!r} is not a built-in module', name=fullname) return fxn(self, fullname) _wrap(_requires_builtin_wrapper, fxn) return _requires_builtin_wrapper def _requires_frozen(fxn): """Decorator to verify the named module is frozen.""" def _requires_frozen_wrapper(self, fullname): if not _imp.is_frozen(fullname): raise ImportError(f'{fullname!r} is not a frozen module', name=fullname) return fxn(self, fullname) _wrap(_requires_frozen_wrapper, fxn) return _requires_frozen_wrapper # Typically used by loader classes as a method replacement. def _load_module_shim(self, fullname): """Load the specified module into sys.modules and return it. This method is deprecated. Use loader.exec_module() instead. """ msg = ("the load_module() method is deprecated and slated for removal in " "Python 3.15; use exec_module() instead") _warnings.warn(msg, DeprecationWarning) spec = spec_from_loader(fullname, self) if fullname in sys.modules: module = sys.modules[fullname] _exec(spec, module) return sys.modules[fullname] else: return _load(spec) # Module specifications ####################################################### def _module_repr(module): """The implementation of ModuleType.__repr__().""" loader = getattr(module, '__loader__', None) if spec := getattr(module, "__spec__", None): return _module_repr_from_spec(spec) # Fall through to a catch-all which always succeeds. try: name = module.__name__ except AttributeError: name = '?' try: filename = module.__file__ except AttributeError: if loader is None: return f'<module {name!r}>' else: return f'<module {name!r} ({loader!r})>' else: return f'<module {name!r} from {filename!r}>' class ModuleSpec: """The specification for a module, used for loading. A module's spec is the source for information about the module. For data associated with the module, including source, use the spec's loader. `name` is the absolute name of the module. `loader` is the loader to use when loading the module. `parent` is the name of the package the module is in. The parent is derived from the name. `is_package` determines if the module is considered a package or not. On modules this is reflected by the `__path__` attribute. `origin` is the specific location used by the loader from which to load the module, if that information is available. When filename is set, origin will match. `has_location` indicates that a spec's "origin" reflects a location. When this is True, `__file__` attribute of the module is set. `cached` is the location of the cached bytecode file, if any. It corresponds to the `__cached__` attribute. `submodule_search_locations` is the sequence of path entries to search when importing submodules. If set, is_package should be True--and False otherwise. Packages are simply modules that (may) have submodules. If a spec has a non-None value in `submodule_search_locations`, the import system will consider modules loaded from the spec as packages. Only finders (see importlib.abc.MetaPathFinder and importlib.abc.PathEntryFinder) should modify ModuleSpec instances. """ def __init__(self, name, loader, *, origin=None, loader_state=None, is_package=None): self.name = name self.loader = loader self.origin = origin self.loader_state = loader_state self.submodule_search_locations = [] if is_package else None self._uninitialized_submodules = [] # file-location attributes self._set_fileattr = False self._cached = None def __repr__(self): args = [f'name={self.name!r}', f'loader={self.loader!r}'] if self.origin is not None: args.append(f'origin={self.origin!r}') if self.submodule_search_locations is not None: args.append(f'submodule_search_locations={self.submodule_search_locations}') return f'{self.__class__.__name__}({", ".join(args)})' def __eq__(self, other): smsl = self.submodule_search_locations try: return (self.name == other.name and self.loader == other.loader and self.origin == other.origin and smsl == other.submodule_search_locations and self.cached == other.cached and self.has_location == other.has_location) except AttributeError: return NotImplemented @property def cached(self): if self._cached is None: if self.origin is not None and self._set_fileattr: if _bootstrap_external is None: raise NotImplementedError self._cached = _bootstrap_external._get_cached(self.origin) return self._cached @cached.setter def cached(self, cached): self._cached = cached @property def parent(self): """The name of the module's parent.""" if self.submodule_search_locations is None: return self.name.rpartition('.')[0] else: return self.name @property def has_location(self): return self._set_fileattr @has_location.setter def has_location(self, value): self._set_fileattr = bool(value) def spec_from_loader(name, loader, *, origin=None, is_package=None): """Return a module spec based on various loader methods.""" if origin is None: origin = getattr(loader, '_ORIGIN', None) if not origin and hasattr(loader, 'get_filename'): if _bootstrap_external is None: raise NotImplementedError spec_from_file_location = _bootstrap_external.spec_from_file_location if is_package is None: return spec_from_file_location(name, loader=loader) search = [] if is_package else None return spec_from_file_location(name, loader=loader, submodule_search_locations=search) if is_package is None: if hasattr(loader, 'is_package'): try: is_package = loader.is_package(name) except ImportError: is_package = None # aka, undefined else: # the default is_package = False return ModuleSpec(name, loader, origin=origin, is_package=is_package) def _spec_from_module(module, loader=None, origin=None): # This function is meant for use in _setup(). try: spec = module.__spec__ except AttributeError: pass else: if spec is not None: return spec name = module.__name__ if loader is None: try: loader = module.__loader__ except AttributeError: # loader will stay None. pass try: location = module.__file__ except AttributeError: location = None if origin is None: if loader is not None: origin = getattr(loader, '_ORIGIN', None) if not origin and location is not None: origin = location try: cached = module.__cached__ except AttributeError: cached = None try: submodule_search_locations = list(module.__path__) except AttributeError: submodule_search_locations = None spec = ModuleSpec(name, loader, origin=origin) spec._set_fileattr = False if location is None else (origin == location) spec.cached = cached spec.submodule_search_locations = submodule_search_locations return spec def _init_module_attrs(spec, module, *, override=False): # The passed-in module may be not support attribute assignment, # in which case we simply don't set the attributes. # __name__ if (override or getattr(module, '__name__', None) is None): try: module.__name__ = spec.name except AttributeError: pass # __loader__ if override or getattr(module, '__loader__', None) is None: loader = spec.loader if loader is None: # A backward compatibility hack. if spec.submodule_search_locations is not None: if _bootstrap_external is None: raise NotImplementedError NamespaceLoader = _bootstrap_external.NamespaceLoader loader = NamespaceLoader.__new__(NamespaceLoader) loader._path = spec.submodule_search_locations spec.loader = loader # While the docs say that module.__file__ is not set for # built-in modules, and the code below will avoid setting it if # spec.has_location is false, this is incorrect for namespace # packages. Namespace packages have no location, but their # __spec__.origin is None, and thus their module.__file__ # should also be None for consistency. While a bit of a hack, # this is the best place to ensure this consistency. # # See # https://docs.python.org/3/library/importlib.html#importlib.abc.Loader.load_module # and bpo-32305 module.__file__ = None try: module.__loader__ = loader except AttributeError: pass # __package__ if override or getattr(module, '__package__', None) is None: try: module.__package__ = spec.parent except AttributeError: pass # __spec__ try: module.__spec__ = spec except AttributeError: pass # __path__ if override or getattr(module, '__path__', None) is None: if spec.submodule_search_locations is not None: # XXX We should extend __path__ if it's already a list. try: module.__path__ = spec.submodule_search_locations except AttributeError: pass # __file__/__cached__ if spec.has_location: if override or getattr(module, '__file__', None) is None: try: module.__file__ = spec.origin except AttributeError: pass if override or getattr(module, '__cached__', None) is None: if spec.cached is not None: try: module.__cached__ = spec.cached except AttributeError: pass return module def module_from_spec(spec): """Create a module based on the provided spec.""" # Typically loaders will not implement create_module(). module = None if hasattr(spec.loader, 'create_module'): # If create_module() returns `None` then it means default # module creation should be used. module = spec.loader.create_module(spec) elif hasattr(spec.loader, 'exec_module'): raise ImportError('loaders that define exec_module() ' 'must also define create_module()') if module is None: module = _new_module(spec.name) _init_module_attrs(spec, module) return module def _module_repr_from_spec(spec): """Return the repr to use for the module.""" name = '?' if spec.name is None else spec.name if spec.origin is None: loader = spec.loader if loader is None: return f'<module {name!r}>' elif ( _bootstrap_external is not None and isinstance(loader, _bootstrap_external.NamespaceLoader) ): return f'<module {name!r} (namespace) from {list(loader._path)}>' else: return f'<module {name!r} ({loader!r})>' else: if spec.has_location: return f'<module {name!r} from {spec.origin!r}>' else: return f'<module {spec.name!r} ({spec.origin})>' # Used by importlib.reload() and _load_module_shim(). def _exec(spec, module): """Execute the spec's specified module in an existing module's namespace.""" name = spec.name with _ModuleLockManager(name): if sys.modules.get(name) is not module: msg = f'module {name!r} not in sys.modules' raise ImportError(msg, name=name) try: if spec.loader is None: if spec.submodule_search_locations is None: raise ImportError('missing loader', name=spec.name) # Namespace package. _init_module_attrs(spec, module, override=True) else: _init_module_attrs(spec, module, override=True) if not hasattr(spec.loader, 'exec_module'): msg = (f"{_object_name(spec.loader)}.exec_module() not found; " "falling back to load_module()") _warnings.warn(msg, ImportWarning) spec.loader.load_module(name) else: spec.loader.exec_module(module) finally: # Update the order of insertion into sys.modules for module # clean-up at shutdown. module = sys.modules.pop(spec.name) sys.modules[spec.name] = module return module def _load_backward_compatible(spec): # It is assumed that all callers have been warned about using load_module() # appropriately before calling this function. try: spec.loader.load_module(spec.name) except: if spec.name in sys.modules: module = sys.modules.pop(spec.name) sys.modules[spec.name] = module raise # The module must be in sys.modules at this point! # Move it to the end of sys.modules. module = sys.modules.pop(spec.name) sys.modules[spec.name] = module if getattr(module, '__loader__', None) is None: try: module.__loader__ = spec.loader except AttributeError: pass if getattr(module, '__package__', None) is None: try: # Since module.__path__ may not line up with # spec.submodule_search_paths, we can't necessarily rely # on spec.parent here. module.__package__ = module.__name__ if not hasattr(module, '__path__'): module.__package__ = spec.name.rpartition('.')[0] except AttributeError: pass if getattr(module, '__spec__', None) is None: try: module.__spec__ = spec except AttributeError: pass return module def _load_unlocked(spec): # A helper for direct use by the import system. if spec.loader is not None: # Not a namespace package. if not hasattr(spec.loader, 'exec_module'): msg = (f"{_object_name(spec.loader)}.exec_module() not found; " "falling back to load_module()") _warnings.warn(msg, ImportWarning) return _load_backward_compatible(spec) module = module_from_spec(spec) # This must be done before putting the module in sys.modules # (otherwise an optimization shortcut in import.c becomes # wrong). spec._initializing = True try: sys.modules[spec.name] = module try: if spec.loader is None: if spec.submodule_search_locations is None: raise ImportError('missing loader', name=spec.name) # A namespace package so do nothing. else: spec.loader.exec_module(module) except: try: del sys.modules[spec.name] except KeyError: pass raise # Move the module to the end of sys.modules. # We don't ensure that the import-related module attributes get # set in the sys.modules replacement case. Such modules are on # their own. module = sys.modules.pop(spec.name) sys.modules[spec.name] = module _verbose_message('import {!r} # {!r}', spec.name, spec.loader) finally: spec._initializing = False return module # A method used during testing of _load_unlocked() and by # _load_module_shim(). def _load(spec): """Return a new module object, loaded by the spec's loader. The module is not added to its parent. If a module is already in sys.modules, that existing module gets clobbered. """ with _ModuleLockManager(spec.name): return _load_unlocked(spec) # Loaders ##################################################################### class BuiltinImporter: """Meta path import for built-in modules. All methods are either class or static methods to avoid the need to instantiate the class. """ _ORIGIN = "built-in" @classmethod def find_spec(cls, fullname, path=None, target=None): if _imp.is_builtin(fullname): return spec_from_loader(fullname, cls, origin=cls._ORIGIN) else: return None @staticmethod def create_module(spec): """Create a built-in module""" if spec.name not in sys.builtin_module_names: raise ImportError(f'{spec.name!r} is not a built-in module', name=spec.name) return _call_with_frames_removed(_imp.create_builtin, spec) @staticmethod def exec_module(module): """Exec a built-in module""" _call_with_frames_removed(_imp.exec_builtin, module) @classmethod @_requires_builtin def get_code(cls, fullname): """Return None as built-in modules do not have code objects.""" return None @classmethod @_requires_builtin def get_source(cls, fullname): """Return None as built-in modules do not have source code.""" return None @classmethod @_requires_builtin def is_package(cls, fullname): """Return False as built-in modules are never packages.""" return False load_module = classmethod(_load_module_shim) class FrozenImporter: """Meta path import for frozen modules. All methods are either class or static methods to avoid the need to instantiate the class. """ _ORIGIN = "frozen" @classmethod def _fix_up_module(cls, module): spec = module.__spec__ state = spec.loader_state if state is None: # The module is missing FrozenImporter-specific values. # Fix up the spec attrs. origname = vars(module).pop('__origname__', None) assert origname, 'see PyImport_ImportFrozenModuleObject()' ispkg = hasattr(module, '__path__') assert _imp.is_frozen_package(module.__name__) == ispkg, ispkg filename, pkgdir = cls._resolve_filename(origname, spec.name, ispkg) spec.loader_state = type(sys.implementation)( filename=filename, origname=origname, ) __path__ = spec.submodule_search_locations if ispkg: assert __path__ == [], __path__ if pkgdir: spec.submodule_search_locations.insert(0, pkgdir) else: assert __path__ is None, __path__ # Fix up the module attrs (the bare minimum). assert not hasattr(module, '__file__'), module.__file__ if filename: try: module.__file__ = filename except AttributeError: pass if ispkg: if module.__path__ != __path__: assert module.__path__ == [], module.__path__ module.__path__.extend(__path__) else: # These checks ensure that _fix_up_module() is only called # in the right places. __path__ = spec.submodule_search_locations ispkg = __path__ is not None # Check the loader state. assert sorted(vars(state)) == ['filename', 'origname'], state if state.origname: # The only frozen modules with "origname" set are stdlib modules. (__file__, pkgdir, ) = cls._resolve_filename(state.origname, spec.name, ispkg) assert state.filename == __file__, (state.filename, __file__) if pkgdir: assert __path__ == [pkgdir], (__path__, pkgdir) else: assert __path__ == ([] if ispkg else None), __path__ else: __file__ = None assert state.filename is None, state.filename assert __path__ == ([] if ispkg else None), __path__ # Check the file attrs. if __file__: assert hasattr(module, '__file__') assert module.__file__ == __file__, (module.__file__, __file__) else: assert not hasattr(module, '__file__'), module.__file__ if ispkg: assert hasattr(module, '__path__') assert module.__path__ == __path__, (module.__path__, __path__) else: assert not hasattr(module, '__path__'), module.__path__ assert not spec.has_location @classmethod def _resolve_filename(cls, fullname, alias=None, ispkg=False): if not fullname or not getattr(sys, '_stdlib_dir', None): return None, None try: sep = cls._SEP except AttributeError: sep = cls._SEP = '\\' if sys.platform == 'win32' else '/' if fullname != alias: if fullname.startswith('<'): fullname = fullname[1:] if not ispkg: fullname = f'{fullname}.__init__' else: ispkg = False relfile = fullname.replace('.', sep) if ispkg: pkgdir = f'{sys._stdlib_dir}{sep}{relfile}' filename = f'{pkgdir}{sep}__init__.py' else: pkgdir = None filename = f'{sys._stdlib_dir}{sep}{relfile}.py' return filename, pkgdir @classmethod def find_spec(cls, fullname, path=None, target=None): info = _call_with_frames_removed(_imp.find_frozen, fullname) if info is None: return None # We get the marshaled data in exec_module() (the loader # part of the importer), instead of here (the finder part). # The loader is the usual place to get the data that will # be loaded into the module. (For example, see _LoaderBasics # in _bootstra_external.py.) Most importantly, this importer # is simpler if we wait to get the data. # However, getting as much data in the finder as possible # to later load the module is okay, and sometimes important. # (That's why ModuleSpec.loader_state exists.) This is # especially true if it avoids throwing away expensive data # the loader would otherwise duplicate later and can be done # efficiently. In this case it isn't worth it. _, ispkg, origname = info spec = spec_from_loader(fullname, cls, origin=cls._ORIGIN, is_package=ispkg) filename, pkgdir = cls._resolve_filename(origname, fullname, ispkg) spec.loader_state = type(sys.implementation)( filename=filename, origname=origname, ) if pkgdir: spec.submodule_search_locations.insert(0, pkgdir) return spec @staticmethod def create_module(spec): """Set __file__, if able.""" module = _new_module(spec.name) try: filename = spec.loader_state.filename except AttributeError: pass else: if filename: module.__file__ = filename return module @staticmethod def exec_module(module): spec = module.__spec__ name = spec.name code = _call_with_frames_removed(_imp.get_frozen_object, name) exec(code, module.__dict__) @classmethod def load_module(cls, fullname): """Load a frozen module. This method is deprecated. Use exec_module() instead. """ # Warning about deprecation implemented in _load_module_shim(). module = _load_module_shim(cls, fullname) info = _imp.find_frozen(fullname) assert info is not None _, ispkg, origname = info module.__origname__ = origname vars(module).pop('__file__', None) if ispkg: module.__path__ = [] cls._fix_up_module(module) return module @classmethod @_requires_frozen def get_code(cls, fullname): """Return the code object for the frozen module.""" return _imp.get_frozen_object(fullname) @classmethod @_requires_frozen def get_source(cls, fullname): """Return None as frozen modules do not have source code.""" return None @classmethod @_requires_frozen def is_package(cls, fullname): """Return True if the frozen module is a package.""" return _imp.is_frozen_package(fullname) # Import itself ############################################################### class _ImportLockContext: """Context manager for the import lock.""" def __enter__(self): """Acquire the import lock.""" _imp.acquire_lock() def __exit__(self, exc_type, exc_value, exc_traceback): """Release the import lock regardless of any raised exceptions.""" _imp.release_lock() def _resolve_name(name, package, level): """Resolve a relative module name to an absolute one.""" bits = package.rsplit('.', level - 1) if len(bits) < level: raise ImportError('attempted relative import beyond top-level package') base = bits[0] return f'{base}.{name}' if name else base def _find_spec(name, path, target=None): """Find a module's spec.""" meta_path = sys.meta_path if meta_path is None: # PyImport_Cleanup() is running or has been called. raise ImportError("sys.meta_path is None, Python is likely " "shutting down") if not meta_path: _warnings.warn('sys.meta_path is empty', ImportWarning) # We check sys.modules here for the reload case. While a passed-in # target will usually indicate a reload there is no guarantee, whereas # sys.modules provides one. is_reload = name in sys.modules for finder in meta_path: with _ImportLockContext(): try: find_spec = finder.find_spec except AttributeError: continue else: spec = find_spec(name, path, target) if spec is not None: # The parent import may have already imported this module. if not is_reload and name in sys.modules: module = sys.modules[name] try: __spec__ = module.__spec__ except AttributeError: # We use the found spec since that is the one that # we would have used if the parent module hadn't # beaten us to the punch. return spec else: if __spec__ is None: return spec else: return __spec__ else: return spec else: return None def _sanity_check(name, package, level): """Verify arguments are "sane".""" if not isinstance(name, str): raise TypeError(f'module name must be str, not {type(name)}') if level < 0: raise ValueError('level must be >= 0') if level > 0: if not isinstance(package, str): raise TypeError('__package__ not set to a string') elif not package: raise ImportError('attempted relative import with no known parent ' 'package') if not name and level == 0: raise ValueError('Empty module name') _ERR_MSG_PREFIX = 'No module named ' _ERR_MSG = _ERR_MSG_PREFIX + '{!r}' def _find_and_load_unlocked(name, import_): path = None parent = name.rpartition('.')[0] parent_spec = None if parent: if parent not in sys.modules: _call_with_frames_removed(import_, parent) # Crazy side-effects! if name in sys.modules: return sys.modules[name] parent_module = sys.modules[parent] try: path = parent_module.__path__ except AttributeError: msg = f'{_ERR_MSG_PREFIX}{name!r}; {parent!r} is not a package' raise ModuleNotFoundError(msg, name=name) from None parent_spec = parent_module.__spec__ child = name.rpartition('.')[2] spec = _find_spec(name, path) if spec is None: raise ModuleNotFoundError(f'{_ERR_MSG_PREFIX}{name!r}', name=name) else: if parent_spec: # Temporarily add child we are currently importing to parent's # _uninitialized_submodules for circular import tracking. parent_spec._uninitialized_submodules.append(child) try: module = _load_unlocked(spec) finally: if parent_spec: parent_spec._uninitialized_submodules.pop() if parent: # Set the module as an attribute on its parent. parent_module = sys.modules[parent] try: setattr(parent_module, child, module) except AttributeError: msg = f"Cannot set an attribute on {parent!r} for child module {child!r}" _warnings.warn(msg, ImportWarning) return module _NEEDS_LOADING = object() def _find_and_load(name, import_): """Find and load the module.""" # Optimization: we avoid unneeded module locking if the module # already exists in sys.modules and is fully initialized. module = sys.modules.get(name, _NEEDS_LOADING) if (module is _NEEDS_LOADING or getattr(getattr(module, "__spec__", None), "_initializing", False)): with _ModuleLockManager(name): module = sys.modules.get(name, _NEEDS_LOADING) if module is _NEEDS_LOADING: return _find_and_load_unlocked(name, import_) # Optimization: only call _bootstrap._lock_unlock_module() if # module.__spec__._initializing is True. # NOTE: because of this, initializing must be set *before* # putting the new module in sys.modules. _lock_unlock_module(name) if module is None: message = f'import of {name} halted; None in sys.modules' raise ModuleNotFoundError(message, name=name) return module def _gcd_import(name, package=None, level=0): """Import and return the module based on its name, the package the call is being made from, and the level adjustment. This function represents the greatest common denominator of functionality between import_module and __import__. This includes setting __package__ if the loader did not. """ _sanity_check(name, package, level) if level > 0: name = _resolve_name(name, package, level) return _find_and_load(name, _gcd_import) def _handle_fromlist(module, fromlist, import_, *, recursive=False): """Figure out what __import__ should return. The import_ parameter is a callable which takes the name of module to import. It is required to decouple the function from assuming importlib's import implementation is desired. """ # The hell that is fromlist ... # If a package was imported, try to import stuff from fromlist. for x in fromlist: if not isinstance(x, str): if recursive: where = module.__name__ + '.__all__' else: where = "``from list''" raise TypeError(f"Item in {where} must be str, " f"not {type(x).__name__}") elif x == '*': if not recursive and hasattr(module, '__all__'): _handle_fromlist(module, module.__all__, import_, recursive=True) elif not hasattr(module, x): from_name = f'{module.__name__}.{x}' try: _call_with_frames_removed(import_, from_name) except ModuleNotFoundError as exc: # Backwards-compatibility dictates we ignore failed # imports triggered by fromlist for modules that don't # exist. if (exc.name == from_name and sys.modules.get(from_name, _NEEDS_LOADING) is not None): continue raise return module def _calc___package__(globals): """Calculate what __package__ should be. __package__ is not guaranteed to be defined or could be set to None to represent that its proper value is unknown. """ package = globals.get('__package__') spec = globals.get('__spec__') if package is not None: if spec is not None and package != spec.parent: _warnings.warn("__package__ != __spec__.parent " f"({package!r} != {spec.parent!r})", DeprecationWarning, stacklevel=3) return package elif spec is not None: return spec.parent else: _warnings.warn("can't resolve package from __spec__ or __package__, " "falling back on __name__ and __path__", ImportWarning, stacklevel=3) package = globals['__name__'] if '__path__' not in globals: package = package.rpartition('.')[0] return package def __import__(name, globals=None, locals=None, fromlist=(), level=0): """Import a module. The 'globals' argument is used to infer where the import is occurring from to handle relative imports. The 'locals' argument is ignored. The 'fromlist' argument specifies what should exist as attributes on the module being imported (e.g. ``from module import <fromlist>``). The 'level' argument represents the package location to import from in a relative import (e.g. ``from ..pkg import mod`` would have a 'level' of 2). """ if level == 0: module = _gcd_import(name) else: globals_ = globals if globals is not None else {} package = _calc___package__(globals_) module = _gcd_import(name, package, level) if not fromlist: # Return up to the first dot in 'name'. This is complicated by the fact # that 'name' may be relative. if level == 0: return _gcd_import(name.partition('.')[0]) elif not name: return module else: # Figure out where to slice the module's name up to the first dot # in 'name'. cut_off = len(name) - len(name.partition('.')[0]) # Slice end needs to be positive to alleviate need to special-case # when ``'.' not in name``. return sys.modules[module.__name__[:len(module.__name__)-cut_off]] elif hasattr(module, '__path__'): return _handle_fromlist(module, fromlist, _gcd_import) else: return module def _builtin_from_name(name): spec = BuiltinImporter.find_spec(name) if spec is None: raise ImportError('no built-in module named ' + name) return _load_unlocked(spec) def _setup(sys_module, _imp_module): """Setup importlib by importing needed built-in modules and injecting them into the global namespace. As sys is needed for sys.modules access and _imp is needed to load built-in modules, those two modules must be explicitly passed in. """ global _imp, sys, _blocking_on _imp = _imp_module sys = sys_module # Set up the spec for existing builtin/frozen modules. module_type = type(sys) for name, module in sys.modules.items(): if isinstance(module, module_type): if name in sys.builtin_module_names: loader = BuiltinImporter elif _imp.is_frozen(name): loader = FrozenImporter else: continue spec = _spec_from_module(module, loader) _init_module_attrs(spec, module) if loader is FrozenImporter: loader._fix_up_module(module) # Directly load built-in modules needed during bootstrap. self_module = sys.modules[__name__] for builtin_name in ('_thread', '_warnings', '_weakref'): if builtin_name not in sys.modules: builtin_module = _builtin_from_name(builtin_name) else: builtin_module = sys.modules[builtin_name] setattr(self_module, builtin_name, builtin_module) # Instantiation requires _weakref to have been set. _blocking_on = _WeakValueDictionary() def _install(sys_module, _imp_module): """Install importers for builtin and frozen modules""" _setup(sys_module, _imp_module) sys.meta_path.append(BuiltinImporter) sys.meta_path.append(FrozenImporter) def _install_external_importers(): """Install importers that require external filesystem access""" global _bootstrap_external import _frozen_importlib_external _bootstrap_external = _frozen_importlib_external _frozen_importlib_external._install(sys.modules[__name__]) PK �#]�Ӱ � __init__.pynu �[��� """A pure Python implementation of import.""" __all__ = ['__import__', 'import_module', 'invalidate_caches', 'reload'] # Bootstrap help ##################################################### # Until bootstrapping is complete, DO NOT import any modules that attempt # to import importlib._bootstrap (directly or indirectly). Since this # partially initialised package would be present in sys.modules, those # modules would get an uninitialised copy of the source version, instead # of a fully initialised version (either the frozen one or the one # initialised below if the frozen one is not available). import _imp # Just the builtin component, NOT the full Python module import sys try: import _frozen_importlib as _bootstrap except ImportError: from . import _bootstrap _bootstrap._setup(sys, _imp) else: # importlib._bootstrap is the built-in import, ensure we don't create # a second copy of the module. _bootstrap.__name__ = 'importlib._bootstrap' _bootstrap.__package__ = 'importlib' try: _bootstrap.__file__ = __file__.replace('__init__.py', '_bootstrap.py') except NameError: # __file__ is not guaranteed to be defined, e.g. if this code gets # frozen by a tool like cx_Freeze. pass sys.modules['importlib._bootstrap'] = _bootstrap try: import _frozen_importlib_external as _bootstrap_external except ImportError: from . import _bootstrap_external _bootstrap_external._set_bootstrap_module(_bootstrap) _bootstrap._bootstrap_external = _bootstrap_external else: _bootstrap_external.__name__ = 'importlib._bootstrap_external' _bootstrap_external.__package__ = 'importlib' try: _bootstrap_external.__file__ = __file__.replace('__init__.py', '_bootstrap_external.py') except NameError: # __file__ is not guaranteed to be defined, e.g. if this code gets # frozen by a tool like cx_Freeze. pass sys.modules['importlib._bootstrap_external'] = _bootstrap_external # To simplify imports in test code _pack_uint32 = _bootstrap_external._pack_uint32 _unpack_uint32 = _bootstrap_external._unpack_uint32 # Fully bootstrapped at this point, import whatever you like, circular # dependencies and startup overhead minimisation permitting :) import warnings # Public API ######################################################### from ._bootstrap import __import__ def invalidate_caches(): """Call the invalidate_caches() method on all meta path finders stored in sys.meta_path (where implemented).""" for finder in sys.meta_path: if hasattr(finder, 'invalidate_caches'): finder.invalidate_caches() def import_module(name, package=None): """Import a module. The 'package' argument is required when performing a relative import. It specifies the package to use as the anchor point from which to resolve the relative import to an absolute import. """ level = 0 if name.startswith('.'): if not package: raise TypeError("the 'package' argument is required to perform a " f"relative import for {name!r}") for character in name: if character != '.': break level += 1 return _bootstrap._gcd_import(name[level:], package, level) _RELOADING = {} def reload(module): """Reload the module and return it. The module must have been successfully imported before. """ try: name = module.__spec__.name except AttributeError: try: name = module.__name__ except AttributeError: raise TypeError("reload() argument must be a module") from None if sys.modules.get(name) is not module: raise ImportError(f"module {name} not in sys.modules", name=name) if name in _RELOADING: return _RELOADING[name] _RELOADING[name] = module try: parent_name = name.rpartition('.')[0] if parent_name: try: parent = sys.modules[parent_name] except KeyError: raise ImportError(f"parent {parent_name!r} not in sys.modules", name=parent_name) from None else: pkgpath = parent.__path__ else: pkgpath = None target = module spec = module.__spec__ = _bootstrap._find_spec(name, pkgpath, target) if spec is None: raise ModuleNotFoundError(f"spec not found for the module {name!r}", name=name) _bootstrap._exec(spec, module) # The module may have replaced itself in sys.modules! return sys.modules[name] finally: try: del _RELOADING[name] except KeyError: pass PK �#]/E��J J _abc.pynu �[��� """Subset of importlib.abc used to reduce importlib.util imports.""" from . import _bootstrap import abc class Loader(metaclass=abc.ABCMeta): """Abstract base class for import loaders.""" def create_module(self, spec): """Return a module to initialize and into which to load. This method should raise ImportError if anything prevents it from creating a new module. It may return None to indicate that the spec should create the new module. """ # By default, defer to default semantics for the new module. return None # We don't define exec_module() here since that would break # hasattr checks we do to support backward compatibility. def load_module(self, fullname): """Return the loaded module. The module must be added to sys.modules and have import-related attributes set properly. The fullname is a str. ImportError is raised on failure. This method is deprecated in favor of loader.exec_module(). If exec_module() exists then it is used to provide a backwards-compatible functionality for this method. """ if not hasattr(self, 'exec_module'): raise ImportError # Warning implemented in _load_module_shim(). return _bootstrap._load_module_shim(self, fullname) PK �#]���'S S resources/abc.pynu �[��� import abc import io import itertools import os import pathlib from typing import Any, BinaryIO, Iterable, Iterator, NoReturn, Text, Optional from typing import runtime_checkable, Protocol from typing import Union StrPath = Union[str, os.PathLike[str]] __all__ = ["ResourceReader", "Traversable", "TraversableResources"] class ResourceReader(metaclass=abc.ABCMeta): """Abstract base class for loaders to provide resource reading support.""" @abc.abstractmethod def open_resource(self, resource: Text) -> BinaryIO: """Return an opened, file-like object for binary reading. The 'resource' argument is expected to represent only a file name. If the resource cannot be found, FileNotFoundError is raised. """ # This deliberately raises FileNotFoundError instead of # NotImplementedError so that if this method is accidentally called, # it'll still do the right thing. raise FileNotFoundError @abc.abstractmethod def resource_path(self, resource: Text) -> Text: """Return the file system path to the specified resource. The 'resource' argument is expected to represent only a file name. If the resource does not exist on the file system, raise FileNotFoundError. """ # This deliberately raises FileNotFoundError instead of # NotImplementedError so that if this method is accidentally called, # it'll still do the right thing. raise FileNotFoundError @abc.abstractmethod def is_resource(self, path: Text) -> bool: """Return True if the named 'path' is a resource. Files are resources, directories are not. """ raise FileNotFoundError @abc.abstractmethod def contents(self) -> Iterable[str]: """Return an iterable of entries in `package`.""" raise FileNotFoundError class TraversalError(Exception): pass @runtime_checkable class Traversable(Protocol): """ An object with a subset of pathlib.Path methods suitable for traversing directories and opening files. Any exceptions that occur when accessing the backing resource may propagate unaltered. """ @abc.abstractmethod def iterdir(self) -> Iterator["Traversable"]: """ Yield Traversable objects in self """ def read_bytes(self) -> bytes: """ Read contents of self as bytes """ with self.open('rb') as strm: return strm.read() def read_text(self, encoding: Optional[str] = None) -> str: """ Read contents of self as text """ with self.open(encoding=encoding) as strm: return strm.read() @abc.abstractmethod def is_dir(self) -> bool: """ Return True if self is a directory """ @abc.abstractmethod def is_file(self) -> bool: """ Return True if self is a file """ def joinpath(self, *descendants: StrPath) -> "Traversable": """ Return Traversable resolved with any descendants applied. Each descendant should be a path segment relative to self and each may contain multiple levels separated by ``posixpath.sep`` (``/``). """ if not descendants: return self names = itertools.chain.from_iterable( path.parts for path in map(pathlib.PurePosixPath, descendants) ) target = next(names) matches = ( traversable for traversable in self.iterdir() if traversable.name == target ) try: match = next(matches) except StopIteration: raise TraversalError( "Target not found during traversal.", target, list(names) ) return match.joinpath(*names) def __truediv__(self, child: StrPath) -> "Traversable": """ Return Traversable child in self """ return self.joinpath(child) @abc.abstractmethod def open(self, mode='r', *args, **kwargs): """ mode may be 'r' or 'rb' to open as text or binary. Return a handle suitable for reading (same as pathlib.Path.open). When opening as text, accepts encoding parameters such as those accepted by io.TextIOWrapper. """ @property @abc.abstractmethod def name(self) -> str: """ The base name of this object without any parent references. """ class TraversableResources(ResourceReader): """ The required interface for providing traversable resources. """ @abc.abstractmethod def files(self) -> "Traversable": """Return a Traversable object for the loaded package.""" def open_resource(self, resource: StrPath) -> io.BufferedReader: return self.files().joinpath(resource).open('rb') def resource_path(self, resource: Any) -> NoReturn: raise FileNotFoundError(resource) def is_resource(self, path: StrPath) -> bool: return self.files().joinpath(path).is_file() def contents(self) -> Iterator[str]: return (item.name for item in self.files().iterdir()) PK �#]]�� resources/readers.pynu �[��� import collections import itertools import pathlib import operator import zipfile from . import abc from ._itertools import only def remove_duplicates(items): return iter(collections.OrderedDict.fromkeys(items)) class FileReader(abc.TraversableResources): def __init__(self, loader): self.path = pathlib.Path(loader.path).parent def resource_path(self, resource): """ Return the file system path to prevent `resources.path()` from creating a temporary copy. """ return str(self.path.joinpath(resource)) def files(self): return self.path class ZipReader(abc.TraversableResources): def __init__(self, loader, module): self.prefix = loader.prefix.replace('\\', '/') if loader.is_package(module): _, _, name = module.rpartition('.') self.prefix += name + '/' self.archive = loader.archive def open_resource(self, resource): try: return super().open_resource(resource) except KeyError as exc: raise FileNotFoundError(exc.args[0]) def is_resource(self, path): """ Workaround for `zipfile.Path.is_file` returning true for non-existent paths. """ target = self.files().joinpath(path) return target.is_file() and target.exists() def files(self): return zipfile.Path(self.archive, self.prefix) class MultiplexedPath(abc.Traversable): """ Given a series of Traversable objects, implement a merged version of the interface across all objects. Useful for namespace packages which may be multihomed at a single name. """ def __init__(self, *paths): self._paths = list(map(pathlib.Path, remove_duplicates(paths))) if not self._paths: message = 'MultiplexedPath must contain at least one path' raise FileNotFoundError(message) if not all(path.is_dir() for path in self._paths): raise NotADirectoryError('MultiplexedPath only supports directories') def iterdir(self): children = (child for path in self._paths for child in path.iterdir()) by_name = operator.attrgetter('name') groups = itertools.groupby(sorted(children, key=by_name), key=by_name) return map(self._follow, (locs for name, locs in groups)) def read_bytes(self): raise FileNotFoundError(f'{self} is not a file') def read_text(self, *args, **kwargs): raise FileNotFoundError(f'{self} is not a file') def is_dir(self): return True def is_file(self): return False def joinpath(self, *descendants): try: return super().joinpath(*descendants) except abc.TraversalError: # One of the paths did not resolve (a directory does not exist). # Just return something that will not exist. return self._paths[0].joinpath(*descendants) @classmethod def _follow(cls, children): """ Construct a MultiplexedPath if needed. If children contains a sole element, return it. Otherwise, return a MultiplexedPath of the items. Unless one of the items is not a Directory, then return the first. """ subdirs, one_dir, one_file = itertools.tee(children, 3) try: return only(one_dir) except ValueError: try: return cls(*subdirs) except NotADirectoryError: return next(one_file) def open(self, *args, **kwargs): raise FileNotFoundError(f'{self} is not a file') @property def name(self): return self._paths[0].name def __repr__(self): paths = ', '.join(f"'{path}'" for path in self._paths) return f'MultiplexedPath({paths})' class NamespaceReader(abc.TraversableResources): def __init__(self, namespace_path): if 'NamespacePath' not in str(namespace_path): raise ValueError('Invalid path') self.path = MultiplexedPath(*list(namespace_path)) def resource_path(self, resource): """ Return the file system path to prevent `resources.path()` from creating a temporary copy. """ return str(self.path.joinpath(resource)) def files(self): return self.path PK �#](�e�� � resources/_legacy.pynu �[��� import functools import os import pathlib import types import warnings from typing import Union, Iterable, ContextManager, BinaryIO, TextIO, Any from . import _common Package = Union[types.ModuleType, str] Resource = str def normalize_path(path: Any) -> str: """Normalize a path by ensuring it is a string. If the resulting string contains path separators, an exception is raised. """ str_path = str(path) parent, file_name = os.path.split(str_path) if parent: raise ValueError(f'{path!r} must be only a file name') return file_name def open_binary(package: Package, resource: Resource) -> BinaryIO: """Return a file-like object opened for binary reading of the resource.""" return (_common.files(package) / normalize_path(resource)).open('rb') def read_binary(package: Package, resource: Resource) -> bytes: """Return the binary contents of the resource.""" return (_common.files(package) / normalize_path(resource)).read_bytes() def open_text( package: Package, resource: Resource, encoding: str = 'utf-8', errors: str = 'strict', ) -> TextIO: """Return a file-like object opened for text reading of the resource.""" return (_common.files(package) / normalize_path(resource)).open( 'r', encoding=encoding, errors=errors ) def read_text( package: Package, resource: Resource, encoding: str = 'utf-8', errors: str = 'strict', ) -> str: """Return the decoded string of the resource. The decoding-related arguments have the same semantics as those of bytes.decode(). """ with open_text(package, resource, encoding, errors) as fp: return fp.read() def contents(package: Package) -> Iterable[str]: """Return an iterable of entries in `package`. Note that not all entries are resources. Specifically, directories are not considered resources. Use `is_resource()` on each entry returned here to check if it is a resource or not. """ return [path.name for path in _common.files(package).iterdir()] def is_resource(package: Package, name: str) -> bool: """True if `name` is a resource inside `package`. Directories are *not* resources. """ resource = normalize_path(name) return any( traversable.name == resource and traversable.is_file() for traversable in _common.files(package).iterdir() ) def path( package: Package, resource: Resource, ) -> ContextManager[pathlib.Path]: """A context manager providing a file path object to the resource. If the resource does not already exist on its own on the file system, a temporary file will be created. If the file was created, the file will be deleted upon exiting the context manager (no exception is raised if the file was deleted prior to the context manager exiting). """ return _common.as_file(_common.files(package) / normalize_path(resource)) PK �#]or!� � resources/_itertools.pynu �[��� # from more_itertools 9.0 def only(iterable, default=None, too_long=None): """If *iterable* has only one item, return it. If it has zero items, return *default*. If it has more than one item, raise the exception given by *too_long*, which is ``ValueError`` by default. >>> only([], default='missing') 'missing' >>> only([1]) 1 >>> only([1, 2]) # doctest: +IGNORE_EXCEPTION_DETAIL Traceback (most recent call last): ... ValueError: Expected exactly one item in iterable, but got 1, 2, and perhaps more.' >>> only([1, 2], too_long=TypeError) # doctest: +IGNORE_EXCEPTION_DETAIL Traceback (most recent call last): ... TypeError Note that :func:`only` attempts to advance *iterable* twice to ensure there is only one item. See :func:`spy` or :func:`peekable` to check iterable contents less destructively. """ it = iter(iterable) first_value = next(it, default) try: second_value = next(it) except StopIteration: pass else: msg = ( 'Expected exactly one item in iterable, but got {!r}, {!r}, ' 'and perhaps more.'.format(first_value, second_value) ) raise too_long or ValueError(msg) return first_value PK �#]"�y8 resources/__init__.pynu �[��� """Read resources contained within a package.""" from ._common import ( as_file, files, Package, Anchor, ) from ._legacy import ( contents, open_binary, read_binary, open_text, read_text, is_resource, path, Resource, ) from .abc import ResourceReader __all__ = [ 'Package', 'Anchor', 'Resource', 'ResourceReader', 'as_file', 'contents', 'files', 'is_resource', 'open_binary', 'open_text', 'path', 'read_binary', 'read_text', ] PK �#]��Kln n resources/_common.pynu �[��� import os import pathlib import tempfile import functools import contextlib import types import importlib import inspect import warnings import itertools from typing import Union, Optional, cast from .abc import ResourceReader, Traversable from ._adapters import wrap_spec Package = Union[types.ModuleType, str] Anchor = Package def package_to_anchor(func): """ Replace 'package' parameter as 'anchor' and warn about the change. Other errors should fall through. >>> files('a', 'b') Traceback (most recent call last): TypeError: files() takes from 0 to 1 positional arguments but 2 were given """ undefined = object() @functools.wraps(func) def wrapper(anchor=undefined, package=undefined): if package is not undefined: if anchor is not undefined: return func(anchor, package) warnings.warn( "First parameter to files is renamed to 'anchor'", DeprecationWarning, stacklevel=2, ) return func(package) elif anchor is undefined: return func() return func(anchor) return wrapper @package_to_anchor def files(anchor: Optional[Anchor] = None) -> Traversable: """ Get a Traversable resource for an anchor. """ return from_package(resolve(anchor)) def get_resource_reader(package: types.ModuleType) -> Optional[ResourceReader]: """ Return the package's loader if it's a ResourceReader. """ # We can't use # a issubclass() check here because apparently abc.'s __subclasscheck__() # hook wants to create a weak reference to the object, but # zipimport.zipimporter does not support weak references, resulting in a # TypeError. That seems terrible. spec = package.__spec__ reader = getattr(spec.loader, 'get_resource_reader', None) # type: ignore if reader is None: return None return reader(spec.name) # type: ignore @functools.singledispatch def resolve(cand: Optional[Anchor]) -> types.ModuleType: return cast(types.ModuleType, cand) @resolve.register def _(cand: str) -> types.ModuleType: return importlib.import_module(cand) @resolve.register def _(cand: None) -> types.ModuleType: return resolve(_infer_caller().f_globals['__name__']) def _infer_caller(): """ Walk the stack and find the frame of the first caller not in this module. """ def is_this_file(frame_info): return frame_info.filename == stack[0].filename def is_wrapper(frame_info): return frame_info.function == 'wrapper' stack = inspect.stack() not_this_file = itertools.filterfalse(is_this_file, stack) # also exclude 'wrapper' due to singledispatch in the call stack callers = itertools.filterfalse(is_wrapper, not_this_file) return next(callers).frame def from_package(package: types.ModuleType): """ Return a Traversable object for the given package. """ spec = wrap_spec(package) reader = spec.loader.get_resource_reader(spec.name) return reader.files() @contextlib.contextmanager def _tempfile( reader, suffix='', # gh-93353: Keep a reference to call os.remove() in late Python # finalization. *, _os_remove=os.remove, ): # Not using tempfile.NamedTemporaryFile as it leads to deeper 'try' # blocks due to the need to close the temporary file to work on Windows # properly. fd, raw_path = tempfile.mkstemp(suffix=suffix) try: try: os.write(fd, reader()) finally: os.close(fd) del reader yield pathlib.Path(raw_path) finally: try: _os_remove(raw_path) except FileNotFoundError: pass def _temp_file(path): return _tempfile(path.read_bytes, suffix=path.name) def _is_present_dir(path: Traversable) -> bool: """ Some Traversables implement ``is_dir()`` to raise an exception (i.e. ``FileNotFoundError``) when the directory doesn't exist. This function wraps that call to always return a boolean and only return True if there's a dir and it exists. """ with contextlib.suppress(FileNotFoundError): return path.is_dir() return False @functools.singledispatch def as_file(path): """ Given a Traversable object, return that object as a path on the local file system in a context manager. """ return _temp_dir(path) if _is_present_dir(path) else _temp_file(path) @as_file.register(pathlib.Path) @contextlib.contextmanager def _(path): """ Degenerate behavior for pathlib.Path objects. """ yield path @contextlib.contextmanager def _temp_path(dir: tempfile.TemporaryDirectory): """ Wrap tempfile.TemporyDirectory to return a pathlib object. """ with dir as result: yield pathlib.Path(result) @contextlib.contextmanager def _temp_dir(path): """ Given a traversable dir, recursively replicate the whole tree to the file system in a context manager. """ assert path.is_dir() with _temp_path(tempfile.TemporaryDirectory()) as temp_dir: yield _write_contents(temp_dir, path) def _write_contents(target, source): child = target.joinpath(source.name) if source.is_dir(): child.mkdir() for item in source.iterdir(): _write_contents(child, item) else: child.write_bytes(source.read_bytes()) return child PK �#]�z� � resources/_adapters.pynu �[��� from contextlib import suppress from io import TextIOWrapper from . import abc class SpecLoaderAdapter: """ Adapt a package spec to adapt the underlying loader. """ def __init__(self, spec, adapter=lambda spec: spec.loader): self.spec = spec self.loader = adapter(spec) def __getattr__(self, name): return getattr(self.spec, name) class TraversableResourcesLoader: """ Adapt a loader to provide TraversableResources. """ def __init__(self, spec): self.spec = spec def get_resource_reader(self, name): return CompatibilityFiles(self.spec)._native() def _io_wrapper(file, mode='r', *args, **kwargs): if mode == 'r': return TextIOWrapper(file, *args, **kwargs) elif mode == 'rb': return file raise ValueError(f"Invalid mode value '{mode}', only 'r' and 'rb' are supported") class CompatibilityFiles: """ Adapter for an existing or non-existent resource reader to provide a compatibility .files(). """ class SpecPath(abc.Traversable): """ Path tied to a module spec. Can be read and exposes the resource reader children. """ def __init__(self, spec, reader): self._spec = spec self._reader = reader def iterdir(self): if not self._reader: return iter(()) return iter( CompatibilityFiles.ChildPath(self._reader, path) for path in self._reader.contents() ) def is_file(self): return False is_dir = is_file def joinpath(self, other): if not self._reader: return CompatibilityFiles.OrphanPath(other) return CompatibilityFiles.ChildPath(self._reader, other) @property def name(self): return self._spec.name def open(self, mode='r', *args, **kwargs): return _io_wrapper(self._reader.open_resource(None), mode, *args, **kwargs) class ChildPath(abc.Traversable): """ Path tied to a resource reader child. Can be read but doesn't expose any meaningful children. """ def __init__(self, reader, name): self._reader = reader self._name = name def iterdir(self): return iter(()) def is_file(self): return self._reader.is_resource(self.name) def is_dir(self): return not self.is_file() def joinpath(self, other): return CompatibilityFiles.OrphanPath(self.name, other) @property def name(self): return self._name def open(self, mode='r', *args, **kwargs): return _io_wrapper( self._reader.open_resource(self.name), mode, *args, **kwargs ) class OrphanPath(abc.Traversable): """ Orphan path, not tied to a module spec or resource reader. Can't be read and doesn't expose any meaningful children. """ def __init__(self, *path_parts): if len(path_parts) < 1: raise ValueError('Need at least one path part to construct a path') self._path = path_parts def iterdir(self): return iter(()) def is_file(self): return False is_dir = is_file def joinpath(self, other): return CompatibilityFiles.OrphanPath(*self._path, other) @property def name(self): return self._path[-1] def open(self, mode='r', *args, **kwargs): raise FileNotFoundError("Can't open orphan path") def __init__(self, spec): self.spec = spec @property def _reader(self): with suppress(AttributeError): return self.spec.loader.get_resource_reader(self.spec.name) def _native(self): """ Return the native reader if it supports files(). """ reader = self._reader return reader if hasattr(reader, 'files') else self def __getattr__(self, attr): return getattr(self._reader, attr) def files(self): return CompatibilityFiles.SpecPath(self.spec, self._reader) def wrap_spec(package): """ Construct a package spec with traversable compatibility on the spec/loader/reader. """ return SpecLoaderAdapter(package.__spec__, TraversableResourcesLoader) PK �#]��R� resources/simple.pynu �[��� """ Interface adapters for low-level readers. """ import abc import io import itertools from typing import BinaryIO, List from .abc import Traversable, TraversableResources class SimpleReader(abc.ABC): """ The minimum, low-level interface required from a resource provider. """ @property @abc.abstractmethod def package(self) -> str: """ The name of the package for which this reader loads resources. """ @abc.abstractmethod def children(self) -> List['SimpleReader']: """ Obtain an iterable of SimpleReader for available child containers (e.g. directories). """ @abc.abstractmethod def resources(self) -> List[str]: """ Obtain available named resources for this virtual package. """ @abc.abstractmethod def open_binary(self, resource: str) -> BinaryIO: """ Obtain a File-like for a named resource. """ @property def name(self): return self.package.split('.')[-1] class ResourceContainer(Traversable): """ Traversable container for a package's resources via its reader. """ def __init__(self, reader: SimpleReader): self.reader = reader def is_dir(self): return True def is_file(self): return False def iterdir(self): files = (ResourceHandle(self, name) for name in self.reader.resources) dirs = map(ResourceContainer, self.reader.children()) return itertools.chain(files, dirs) def open(self, *args, **kwargs): raise IsADirectoryError() class ResourceHandle(Traversable): """ Handle to a named resource in a ResourceReader. """ def __init__(self, parent: ResourceContainer, name: str): self.parent = parent self.name = name # type: ignore def is_file(self): return True def is_dir(self): return False def open(self, mode='r', *args, **kwargs): stream = self.parent.reader.open_binary(self.name) if 'b' not in mode: stream = io.TextIOWrapper(stream, *args, **kwargs) return stream def joinpath(self, name): raise RuntimeError("Cannot traverse into a resource") class TraversableReader(TraversableResources, SimpleReader): """ A TraversableResources based on SimpleReader. Resource providers may derive from this class to provide the TraversableResources interface by supplying the SimpleReader interface. """ def files(self): return ResourceContainer(self) PK �#]�&�8 8 2 resources/__pycache__/simple.cpython-312.opt-2.pycnu �[��� � T��h � � � d dl Z d dlZd dlZd dlmZmZ ddl mZmZ G d� de j � Z G d� de� Z G d � d e� Z G d� dee � Zy) � N)�BinaryIO�List� )�Traversable�TraversableResourcesc �� � e Zd Z eej defd�� � Zej ded fd�� Z ej dee fd�� Z ej dedefd�� Zed� � Z y) �SimpleReader�returnc � � y �N� ��selfs �3/usr/lib64/python3.12/importlib/resources/simple.py�packagezSimpleReader.package s � � � c � � y r r r s r �childrenzSimpleReader.children s � � r c � � y r r r s r � resourceszSimpleReader.resources! � � � r �resourcec � � y r r )r r s r �open_binaryzSimpleReader.open_binary'