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Added support for reading .pyi files. #4824

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Added support for reading .pyi files. #4824

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11 changes: 11 additions & 0 deletions sphinx/ext/autodoc/importer.py
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Expand Up @@ -156,6 +156,17 @@ def import_object(modname, objpath, objtype='', attrgetter=safe_getattr, warning

try:
module = import_module(modname, warningiserror=warningiserror)
import os
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I think adding new code to here is a bit ugly. How about moving this to helper function?

if hasattr(module, '__file__') and os.path.isfile('{}i'.format(module.__file__)):
try:
from importlib._bootstrap import spec_from_loader
from importlib._bootstrap_external import SourceFileLoader
from importlib._bootstrap import module_from_spec
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Note: these functions are provided by importlib.util package. I feel importlib._bootstrap is private and non-public interface. So this should be refactored later.
https://docs.python.org/3.6/library/importlib.html#importlib.util.spec_from_loader

spec = spec_from_loader(modname, SourceFileLoader(modname, '{}i'.format(module.__file__)))
module = module_from_spec(spec)
spec.loader.exec_module(module)
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I noticed this overrides whole of modules by .pyi's. Is this right?
But .pyi file is not compatible with original .py file. Because they don't have same docstrings, imports and so on. I think this breaks documentation...

except BaseException as e:
raise e
logger.debug('[autodoc] => %r', module)
obj = module
parent = None
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