[issue42955] Add sys.module_names: list of stdlib module names (Python and extension modules)

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

On Fedora 33, the stdlib lives in two main directories:

* /usr/lib64/python3.9: Python modules
* /usr/lib64/python3.9/lib-dynload: C extension modules

Example:

>>> import os.path
>>> os.path.dirname(os.__file__) # Python
'/usr/lib64/python3.9'
>>> os.path.dirname(_asyncio.__file__)
'/usr/lib64/python3.9/lib-dynload'

The Python stdlib path can be retrieved with:

>>> import sysconfig; sysconfig.get_paths()['stdlib']
'/usr/lib64/python3.9'

But I'm not sure how to retrieve /usr/lib64/python3.9/lib-dynload path. "platstdlib" is not what I expect:

>>> import sysconfig; sysconfig.get_paths()['platstdlib']
'/usr/lib64/python3.9'

I found DESTDIR in Makefile:

>>> sysconfig.get_config_var('DESTSHARED')
'/usr/lib64/python3.9/lib-dynload'

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42955>
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