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Issue #17176: Document that imp.NullImporter is no longer inserted

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into sys.path_importer_cache.
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Brett Cannon 2013-03-13 10:46:22 -07:00
parent 8c457d26b1
commit 2514b4871f
2 changed files with 11 additions and 7 deletions
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9
Doc/library/imp.rst
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@ -326,16 +326,17 @@ to indicate the search result of :func:`find_module`.
with an existing directory or empty string raises :exc:`ImportError`.
Otherwise, a :class:`NullImporter` instance is returned.
Python adds instances of this type to ``sys.path_importer_cache`` for any path
entries that are not directories and are not handled by any other path hooks on
``sys.path_hooks``. Instances have only one method:
Instances have only one method:
.. method:: NullImporter.find_module(fullname [, path])
This method always returns ``None``, indicating that the requested module could
not be found.
.. versionchanged:: 3.3
``None`` is inserted into ``sys.path_importer_cache`` instead of an
instance of :class:`NullImporter`.
.. _examples-imp: