Bug 2486569

Since Python 3.15 landed in Rawhide, kickstart installs are broken. They fail with an error "Kickstart file /run/install/ks.cfg is missing." Examining the journal shows a traceback:

 Traceback (most recent call last):
   File "/sbin/parse-kickstart", line 35, in <module>
     from pykickstart.parser import KickstartParser, preprocessKickstart
   File "/usr/lib/python3.15/site-packages/pykickstart/parser.py", line 42, in <module>
     from pykickstart import constants, version
   File "/usr/lib/python3.15/site-packages/pykickstart/version.py", line 55, in <module>
     from pykickstart.load import load_to_str
   File "/usr/lib/python3.15/site-packages/pykickstart/load.py", line 20, in <module>
     import requests
   File "/usr/lib/python3.15/site-packages/requests/__init__.py", line 43, in <module>
     import urllib3
   File "/usr/lib/python3.15/site-packages/urllib3/__init__.py", line 14, in <module>
     from . import exceptions
   File "/usr/lib/python3.15/site-packages/urllib3/exceptions.py", line 7, in <module>
     from http.client import IncompleteRead as httplib_IncompleteRead
   File "/usr/lib64/python3.15/http/client.py", line 71, in <module>
     import email.parser
   File "/usr/lib64/python3.15/email/parser.py", line 12, in <module>
     from email.feedparser import FeedParser, BytesFeedParser
   File "/usr/lib64/python3.15/email/feedparser.py", line 27, in <module>
     from email._policybase import compat32
   File "/usr/lib64/python3.15/email/_policybase.py", line 10, in <module>
     from email.utils import _has_surrogates
   File "/usr/lib64/python3.15/email/utils.py", line 29, in <module>
     import urllib.parse
   File "/usr/lib64/python3.15/urllib/parse.py", line 36, in <module>
     import math
 ModuleNotFoundError: Standard library module '_math_integer' was not found

Ultimately this turns out to be an issue with the dracut/python-deps script - part of anaconda's custom dracut module setup. That script is used by dracut/module-setup.sh to find all the deps of the scripts we want to execute in the initramfs (dracut/parse-kickstart and dracut/driver_updates.py) and install them into the initramfs.

However, with Python 3.15, it seems to be missing a file. _math_integer is provided by /usr/lib64/python3.15/lib-dynload/_math_integer.cpython-315-x86_64-linux-gnu.so , but when you run python-deps on parse-kickstart , it does not list that file, so it does not get included in the initramfs on installer images, and that causes the failure.

I've come up with a minimal reproducer that shows this is actually missed by modulefinder.ModuleFinder (the stdlib dep finder user by python-deps):

<mock-chroot> sh-5.3# cat test.py
import math
<mock-chroot> sh-5.3# python3
>>> from modulefinder import ModuleFinder
>>> finder = ModuleFinder()
>>> finder.run_script("test.py")
>>> finder.modules
{'__main__': Module('__main__', 'test.py'), 'math': Module('math', '/usr/lib64/python3.15/lib-dynload/math.cpython-315-x86_64-linux-gnu.so')}
```
Note that `/usr/lib64/python3.15/lib-dynload/_math_integer.cpython-315-x86_64-linux-gnu.so` is not listed, but then watch this:
```
<mock-chroot> sh-5.3# python3 ./test.py
<mock-chroot> sh-5.3# mv /usr/lib64/python3.15/lib-dynload/_math_integer.cpython-315-x86_64-linux-gnu.so /var/tmp
<mock-chroot> sh-5.3# python3 ./test.py
Traceback (most recent call last):
  File "/builddir/./test.py", line 1, in <module>
    import math
ModuleNotFoundError: Standard library module '_math_integer' was not found

but I'm not sure if this is a bona fide bug in ModuleFinder, or if it's really python-deps' responsibility to deal with this somehow, so filing here first. I'm asking the Python team whether we should also file this as an upstream bug.