Ciphey TypeError with Python 3.9

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Describe the bug After installing Ciphey using pip3, running Ciphey with any argument will cause the problem.

Plaintext ⚠️IMPORTANT⚠️ The below code is non-negotiable for “Ciphey didn’t decrypt…” problems. If you do not tell us your plaintext, we will not help you.

raceback (most recent call last):
  File "<home>/.local/bin/ciphey", line 5, in <module>
    from ciphey.ciphey import main
  File "<home>/.local/lib/python3.9/site-packages/ciphey/__init__.py", line 1, in <module>
    from . import basemods, common, iface
  File "<home>/.local/lib/python3.9/site-packages/ciphey/basemods/__init__.py", line 1, in <module>
    from . import Checkers, Crackers, Decoders, Resources, Searchers
  File "<home>/.local/lib/python3.9/site-packages/ciphey/basemods/Checkers/__init__.py", line 1, in <module>
    from . import any, brandon, ezcheck, format, human, quorum, regex
  File "<home>/.local/lib/python3.9/site-packages/ciphey/basemods/Checkers/any.py", line 3, in <module>
    from ciphey.iface import Config, ParamSpec, PolymorphicChecker, registry
  File "<home>/.local/lib/python3.9/site-packages/ciphey/iface/__init__.py", line 1, in <module>
    from ._config import Config
  File "<home>/.local/lib/python3.9/site-packages/ciphey/iface/_config.py", line 11, in <module>
    from ._modules import PolymorphicChecker, ResourceLoader, Searcher
  File "<home>/.local/lib/python3.9/site-packages/ciphey/iface/_modules.py", line 208, in <module>
    class CrackResult(NamedTuple, Generic[T]):
  File "/usr/lib/python3.9/typing.py", line 1820, in _namedtuple_mro_entries
    raise TypeError("Multiple inheritance with NamedTuple is not supported")
TypeError: Multiple inheritance with NamedTuple is not supported

Version ⚠️IMPORTANT⚠️ We need this information because different environments will induce different bugs in Ciphey

• OS/Distro: Arch Linux
• Python version: Python 3.9.0
• Ciphey versions: ciphey 5.11.0, cipheycore 0.3.2, cipherdists 0.3.34
• Did you use Docker? No

Verbose Output ⚠️IMPORTANT⚠️ Verbose output will tell us why it’s not working the way we expected it to be. Run Ciphey with ciphey -vvv and paste the results into Pastebin.com or a GitHub Gist

Verbose output is the same as the plaintext.

To Reproduce Steps to reproduce the behavior:

1. What input did you use? Any input or without input.
2. What flags / arguments did you use? Any argument or without argument

Expected behavior A clear and concise description of what you expected to happen. Ciphey runs without this error.

Any other information? Add any other context about the problem here.

[eggman64]

This is caused by https://github.com/python/cpython/pull/19363

[scott-m-willett]

Workaround for now may be to comment out line 1880 and 1881 from the file /usr/lib/python3.9/typing.py or the equivalent in your case (line 1820 in your case). Worked for me. Could be other consequences out of this in the future.

This may help you find the lines

def _namedtuple_mro_entries(bases): # if len(bases) > 1: # raise TypeError(“Multiple inheritance with NamedTuple is not supported”)