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cpython/Lib/importlib
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Miro Hrončok ae1965ccb4
bpo-45703: Invalidate _NamespacePath cache on importlib.invalidate_ca… (GH-29384) 
Consider the following directory structure:

    .
    └── PATH1
        └── namespace
            └── sub1
                └── __init__.py

And both PATH1 and PATH2 in sys path:

    $ PYTHONPATH=PATH1:PATH2 python3.11
    >>> import namespace
    >>> import namespace.sub1
    >>> namespace.__path__
    _NamespacePath(['.../PATH1/namespace'])
    >>> ...

While this interpreter still runs, PATH2/namespace/sub2 is created:

    .
    ├── PATH1
    │   └── namespace
    │       └── sub1
    │           └── __init__.py
    └── PATH2
        └── namespace
            └── sub2
                └── __init__.py

The newly created module cannot be imported:

    >>> ...
    >>> namespace.__path__
    _NamespacePath(['.../PATH1/namespace'])
    >>> import namespace.sub2
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    ModuleNotFoundError: No module named 'namespace.sub2'

Calling importlib.invalidate_caches() now newly allows to import it:

    >>> import importlib
    >>> importlib.invalidate_caches()
    >>> namespace.__path__
    _NamespacePath(['.../PATH1/namespace'])
    >>> import namespace.sub2
    >>> namespace.__path__
    _NamespacePath(['.../PATH1/namespace', '.../PATH2/namespace'])

This was not previously possible.
2021-11-23 07:38:02 -08:00
..
metadata [bpo-45765] Fix distribution discovery on empty path. (#29487) 2021-11-09 18:49:43 -05:00
__init__.py bpo-42135 Correct version slated for importlib.find_loader removal (GH-28312) 2021-09-13 15:57:50 -07:00
_abc.py bpo-42136: Deprecate module_repr() as found in importlib (GH-25022) 2021-03-26 11:55:07 -07:00
_adapters.py Fix typos in the Lib directory (GH-28775) 2021-10-06 16:13:48 -07:00
_bootstrap.py bpo-35673: Add a public alias for namespace package __loader__ attribute (#29049) 2021-10-20 14:05:29 -07:00
_bootstrap_external.py bpo-45703: Invalidate _NamespacePath cache on importlib.invalidate_ca… (GH-29384) 2021-11-23 07:38:02 -08:00
_common.py bpo-44771: Sync with importlib_resources 5.2.2, fixing refleak. (#27497) 2021-07-30 20:37:09 -04:00
_itertools.py bpo-44771: Apply changes from importlib_resources 5.2.1 (GH-27436) 2021-07-29 21:05:05 -04:00
_legacy.py bpo-44771: Apply changes from importlib_resources 5.2.1 (GH-27436) 2021-07-29 21:05:05 -04:00
abc.py bpo-35673: Add a public alias for namespace package __loader__ attribute (#29049) 2021-10-20 14:05:29 -07:00
machinery.py bpo-35673: Add a public alias for namespace package __loader__ attribute (#29049) 2021-10-20 14:05:29 -07:00
readers.py bpo-44771: Apply changes from importlib_resources 5.2.1 (GH-27436) 2021-07-29 21:05:05 -04:00
resources.py bpo-44771: Apply changes from importlib_resources 5.2.1 (GH-27436) 2021-07-29 21:05:05 -04:00
simple.py bpo-44771: Apply changes from importlib_resources 5.2.1 (GH-27436) 2021-07-29 21:05:05 -04:00
util.py bpo-43720: Update import-related stdlib deprecation messages to say they will be removed in Python 3.12 (GH-25167) 2021-04-03 15:31:15 -07:00