stdlibs

Simple list of top-level packages in Python's stdlib

Note: If you only need the live module names on 3.10+, just use sys.stdlib_module_names. This is not exactly a backport, but a static list of those for most useful Python versions.

If someone wants to add alternate runtimes, PRs welcome.

Usage

Currently stdlibs.module_names is stdlibs.py3.module_names -- the top-level names that are valid in some version of py3 on some platform. This is a superset of top-level names you may have, and a superset of those in sys.stdlib_module_names.

>>> from stdlibs import module_names
>>> print("os" in module_names)
True
>>> print("peg_parser" in module_names)  # 3.9+
True

If you need a specific version, those are available as other modules:

>>> from stdlibs.py36 import module_names as module_names_py36
>>> print("os" in module_names_py36)
True
>>> print("peg_parser" in module_names_py36)
False

If you intend to process more than one version, you may find the string api easier:

>>> from stdlibs import stdlib_module_names, KNOWN_VERSIONS
>>> [v for v in KNOWN_VERSIONS if "dataclasses" in stdlib_module_names(v)]
['3.7', '3.8', '3.9', '3.10', '3.11']
>>>
>>> sorted(stdlib_module_names("3.7") - stdlib_module_names("3.6"))
['_abc', '_contextvars', '_py_abc', '_queue', '_uuid', '_xxtestfuzz', 'contextvars', 'dataclasses']
>>>
>>> from moreorless.click import unified_diff
>>> prev = None
>>> buf = []
>>> for v in KNOWN_VERSIONS:
...     cur = ''.join([f"{name}\n" for name in sorted(stdlib_module_names(v))])
...     if prev:
...         buf.append(unified_diff(prev, cur, f"new-in-{v}"))
...     prev = cur
>>> print(''.join(''.join(buf).splitlines(True)[:10]), end='')
--- a/new-in-2.4
+++ b/new-in-2.4
@@ -19,7 +19,6 @@
 DocXMLRPCServer
 ERRNO
 EasyDialogs
-FCNTL
 FILE
 FL
 FileDialog

Install

You can install it from PyPI:

$ pip install stdlibs

Regenerating

If you need to regenerate the list, install libcst, add the url to stdlibs/fetch.py, and run that file. Make sure any new versions are added to KNOWN_VERSIONS.

License

stdlibs is copyright John Reese, and licensed under the MIT license. I am providing code in this repository to you under an open source license. This is my personal repository; the license you receive to my code is from me and not from my employer. See the LICENSE file for details.