Add support for python 3.11

[qi55wyqu]

Python 3.11 does not seem to be supported yet.

Python 3.10 shows a warning DeprecationWarning: 'U' mode is deprecated.

Running gherkin.parser.Parser().parse("test.feature") under Python 3.11 results in a ValueError

Output of pytest:

.../virtualenvs/.../lib/python3.11/site-packages/gherkin/parser.py:63: in parse
    token_scanner = TokenScanner(token_scanner_or_str) if isinstance(token_scanner_or_str, str) else token_scanner_or_str
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <gherkin.token_scanner.TokenScanner object at 0x7fa4bccfbe90>
path_or_str = '.../unittests/test.feature'

    def __init__(self, path_or_str):
        if os.path.exists(path_or_str):
>           self.io = io.open(path_or_str, 'rU', encoding='utf8')
E           ValueError: invalid mode: 'rU'

Environment:

• Python 3.11.4
• gherkin-official 24.1.0
• (pytest 7.4.0)

It would be great if you could add support for Python 3.11. Thank you very much.

[yurabysaha]

@mpkorstanje This is still a problem, also I can see pip pin to the old repo and it always gherkin-official 24.1.0 is it possible to fix it too?

[mpkorstanje]

Cucumber is an opensource project, currently mostly run by mostly unpaid volunteers. We do not have a dedicated python maintainer and the other maintainers are somewhat lacking in either python knowledge, time and/or motivation to look at this.

If you or any one else would benefit from this and would be willing to do the work, please hop onto Slack, #commiters channel.

[kieran-ryan]

Issue was resolved prior to November 2022. See #3. Likely a result of using an older version of the parser in combination with the fact that I understand the Python distribution was not being published for a period. Upgrading should resolve the issue for you both @qi55wyqu and @yurabysaha.

gherkin/python/gherkin/token_scanner.py

Line 22 in c645097

self.io = io.open(path_or_str, 'r', encoding='utf8')

I can see pip pin to the old repo and it always gherkin-official 24.1.0 is it possible to fix it too?

@yurabysaha, this is now resolved.