Unhelpful `venv` failure

Start in pyperformance/cli.py around _main() line 371 and compare the installed command with the dev.py venv path. Reproduce both commands and trace how the venv arguments are parsed before _pythoninfo.get_info() is called. Done means the venv command no longer raises the shown AttributeError and reports a useful failure or performs its intended action.

02:03:10.998094000AM CEST maurycy@gimel /Users/maurycy % python -m pyperformance venv
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/Users/maurycy/.pyenv/versions/3.13.5/lib/python3.13/site-packages/pyperformance/__main__.py", line 3, in <module>
    pyperformance.cli.main()
    ~~~~~~~~~~~~~~~~~~~~~~^^
  File "/Users/maurycy/.pyenv/versions/3.13.5/lib/python3.13/site-packages/pyperformance/cli.py", line 422, in main
    _main()
    ~~~~~^^
  File "/Users/maurycy/.pyenv/versions/3.13.5/lib/python3.13/site-packages/pyperformance/cli.py", line 371, in _main
    info = _pythoninfo.get_info(options.python)
                                ^^^^^^^^^^^^^^
AttributeError: 'Namespace' object has no attribute 'python'

Similarly:

02:03:23.225888000AM CEST maurycy@gimel /Users/maurycy/src/pyperformance % python dev.py venv
Traceback (most recent call last):
  File "/Users/maurycy/src/pyperformance/dev.py", line 85, in <module>
    main()
    ~~~~^^
  File "/Users/maurycy/src/pyperformance/dev.py", line 81, in main
    pyperformance.cli.main()
    ~~~~~~~~~~~~~~~~~~~~~~^^
  File "/Users/maurycy/src/pyperformance/pyperformance/cli.py", line 422, in main
    _main()
    ~~~~~^^
  File "/Users/maurycy/src/pyperformance/pyperformance/cli.py", line 371, in _main
    info = _pythoninfo.get_info(options.python)
                                ^^^^^^^^^^^^^^
AttributeError: 'Namespace' object has no attribute 'python'