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Implement the PEP 302 protocol for get_filename() as

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importlib.abc.ExecutionLoader. PyLoader now inherits from this ABC instead of
InspectLoader directly. Both PyLoader and PyPycLoader provide concrete
implementations of get_filename in terms of source_path and bytecode_path.
This commit is contained in:
Brett Cannon 2009-07-20 04:23:48 +00:00
parent 64ef00fa60
commit 6919427e94
6 changed files with 136 additions and 27 deletions
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18
Lib/importlib/abc.py
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@ -76,7 +76,23 @@ InspectLoader.register(machinery.BuiltinImporter)
InspectLoader.register(machinery.FrozenImporter)
class PyLoader(_bootstrap.PyLoader, ResourceLoader, InspectLoader):
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:str) -> str:
"""Abstract method which should return the value that __file__ is to be
set to."""
raise NotImplementedError
class PyLoader(_bootstrap.PyLoader, ResourceLoader, ExecutionLoader):
"""Abstract base class to assist in loading source code by requiring only
back-end storage methods to be implemented.