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bpo-35673: Add a public alias for namespace package __loader__ attribute (#29049)

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Rename namespace package __loader__ class to be public.

Make the old name, i.e. _NamespaceLoader, an alias for the public name, for backward compatibility.
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Barry Warsaw 2021-10-20 14:05:29 -07:00 • committed by GitHub
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commit 876fc7fcec
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7 changed files with 42 additions and 6 deletions
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Doc/library/importlib.rst
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@ -1394,6 +1394,24 @@ find and load modules.
.. versionadded:: 3.4
.. class:: NamespaceLoader(name, path, path_finder):
A concrete implementation of :class:`importlib.abc.InspectLoader` for
namespace packages. This is an alias for a private class and is only made
public for introspecting the ``__loader__`` attribute on namespace
packages::
>>> from importlib.machinery import NamespaceLoader
>>> import my_namespace
>>> isinstance(my_namespace.__loader__, NamespaceLoader)
True
>>> import importlib.abc
>>> isinstance(my_namespace.__loader__, importlib.abc.Loader)
True
.. versionadded:: 3.11
.. class:: ModuleSpec(name, loader, *, origin=None, loader_state=None, is_package=None)
A specification for a module's import-system-related state. This is