version 6.0.0 regression in parsing arguments (seen with flake8-import-order extension)

[zzzeek]

how did you install flake8?

[classic@photon3 foo]$ virtualenv .venv
created virtual environment CPython3.10.0.final.0-64 in 284ms

[classic@photon3 foo]$ source .venv/bin/activate
(.venv) [classic@photon3 foo]$ pip install flake8 flake8_import_order
Collecting flake8
  Using cached flake8-6.0.0-py2.py3-none-any.whl (57 kB)
Collecting flake8_import_order
  Using cached flake8_import_order-0.18.1-py2.py3-none-any.whl (15 kB)

  ... install continues ...

Successfully installed flake8-6.0.0 flake8_import_order-0.18.1 mccabe-0.7.0 pycodestyle-2.10.0 pyflakes-3.0.0

unmodified output of flake8 --bug-report

$  flake8 --bug-report
Traceback (most recent call last):
  File "/home/classic/tmp/foo/.venv/bin/flake8", line 8, in <module>
    sys.exit(main())
  File "/home/classic/tmp/foo/.venv/lib/python3.10/site-packages/flake8/main/cli.py", line 23, in main
    app.run(argv)
  File "/home/classic/tmp/foo/.venv/lib/python3.10/site-packages/flake8/main/application.py", line 198, in run
    self._run(argv)
  File "/home/classic/tmp/foo/.venv/lib/python3.10/site-packages/flake8/main/application.py", line 186, in _run
    self.initialize(argv)
  File "/home/classic/tmp/foo/.venv/lib/python3.10/site-packages/flake8/main/application.py", line 165, in initialize
    self.plugins, self.options = parse_args(argv)
  File "/home/classic/tmp/foo/.venv/lib/python3.10/site-packages/flake8/options/parse_args.py", line 51, in parse_args
    option_manager.register_plugins(plugins)
  File "/home/classic/tmp/foo/.venv/lib/python3.10/site-packages/flake8/options/manager.py", line 259, in register_plugins
    add_options(self)
  File "/home/classic/tmp/foo/.venv/lib/python3.10/site-packages/flake8_import_order/flake8_linter.py", line 44, in add_options
    register_opt(
  File "/home/classic/tmp/foo/.venv/lib/python3.10/site-packages/flake8_import_order/flake8_linter.py", line 98, in register_opt
    parser.add_option(*args, **kwargs)
  File "/home/classic/tmp/foo/.venv/lib/python3.10/site-packages/flake8/options/manager.py", line 281, in add_option
    self._current_group.add_argument(*option_args, **option_kwargs)
  File "/opt/python-3.10.0/lib/python3.10/argparse.py", line 1423, in add_argument
    raise ValueError('%r is not callable' % (type_func,))
ValueError: 'string' is not callable

describe the problem

argument parsing in flake8 is broken as of the just-released version 6.0.0; I took a look in flake8-import-order and it seems to be following flake8's extension API correctly in this regard

...

sample code

import string
import math

commands ran

$ flake8 test.py

[asottile]

the 2-years-deprecated optparse support was removed in 6.0 -- please report to the plugin