Just observed this on the latest Rawhide.
Before python3 package update things were working fine.

$ rpm -q python3 python3-gpg
python3-3.13.0~b4-3.fc41.x86_64
python3-gpg-1.23.2-5.fc41.x86_64
$ python3
Python 3.13.0b4 (main, Jul 30 2024, 00:00:00) [GCC 14.1.1 20240701 (Red Hat 14.1.1-7)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import gpg
>>> with open('gpg-key.pub', "rb") as fd:
...     key = fd.read()
...     
>>> with open('signature-gpg-genuine.sig', "rb") as fd:
...     sig = fd.read()
...     
>>> with open('x509_evm.pem', "rb") as fd:
...     body = fd.read()
...     
>>> import tempfile
>>> with tempfile.TemporaryDirectory() as gpg_homedir:
...     ctx = gpg.Context(home_dir=gpg_homedir)
...     result = ctx.key_import(key)
...     _, result = ctx.verify(body, sig)
...     
>>> print(result)
VerifyResult(file_name=None, is_mime=0, signatures=[Signature(chain_model=False, exp_timestamp=0, fpr='2F9995AB27F987B6E9A0F53F3356F5658E67C76B', hash_algo=8, is_de_vs=False, key=None, notations=[], pka_address=None, pka_trust=0, pubkey_algo=1, status=0, summary=0, timestamp=1722944064, validity=0, validity_reason=0, wrong_key_usage=False)])

After the update to the latest python3:

$ rpm -q python3 python3-gpg
python3-3.13.0~rc1-1.fc41.x86_64
python3-gpg-1.23.2-5.fc41.x86_64


>>> with tempfile.TemporaryDirectory() as gpg_homedir:
...     ctx = gpg.Context(home_dir=gpg_homedir)
...     result = ctx.key_import(key)
...     _, result = ctx.verify(body, sig)
...     
Traceback (most recent call last):
  File "<python-input-5>", line 4, in <module>
    _, result = ctx.verify(body, sig)
                ~~~~~~~~~~^^^^^^^^^^^
  File "/usr/lib64/python3.13/site-packages/gpg/core.py", line 556, in verify
    results = (self.__read__(sink, data), self.op_verify_result())
                                          ~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib64/python3.13/site-packages/gpg/core.py", line 171, in wrapper
    return _funcwrap(self, *args)
  File "/usr/lib64/python3.13/site-packages/gpg/core.py", line 153, in _funcwrap
    result = func(slf.wrapped, *args)
  File "/usr/lib64/python3.13/site-packages/gpg/gpgme.py", line 1381, in gpgme_op_verify_result
    return _gpgme.gpgme_op_verify_result(ctx)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^
  File "<frozen importlib._bootstrap>", line 649, in parent
SystemError: /builddir/build/BUILD/python3.13-3.13.0_rc1-build/Python-3.13.0rc1/Objects/dictobject.c:3774: bad argument to internal function


Reproducible: Always

Steps to Reproduce:
See above
Actual Results:  
Traceback

Expected Results:  
No traceback, signature is verified