[BUG] -3 does not set language level in Cython 3

[lithomas1]

Describe the bug

The -3 flag does not set language level to 3.

When compiling some code with the always_allow_keywords directive set to true with Cython 3, Cython doesn't set the language level to 3 even though -3 is passed, and infers the language level as 3str causing the compile failure.

See logs I have attached below.

Code to reproduce the behaviour:

cython -M --fast-fail -3 --include-dir /home/runner/work/pandas/pandas/build/cp310/pandas/_libs/tslibs '-X always_allow_keywords=true' /home/runner/work/pandas/pandas/pandas/_libs/tslibs/offsets.pyx -o pandas/_libs/tslibs/offsets.cpython-310-x86_64-linux-gnu.so.p/pandas/_libs/tslibs/offsets.pyx.c
  /home/runner/micromamba/envs/test/lib/python3.10/site-packages/Cython/Compiler/Main.py:370: FutureWarning: Cython directive 'language_level' not set, using '3str' for now (Py3). This has changed from earlier releases! File: /home/runner/work/pandas/pandas/pandas/_libs/tslibs/offsets.pxd
    tree = Parsing.p_module(s, pxd, full_module_name)

  Error compiling Cython file:
  ------------------------------------------------------------
  ...

      def get_rule_code_suffix(self) -> str:
          prefix = self._get_suffix_prefix()
          month = MONTH_ALIASES[self.startingMonth]
          weekday = int_to_weekday[self.weekday]
          return f"{prefix}-{month}-{weekday}"

Expected behaviour

Language level should be inferred as 3

OS

Ubuntu 22.04.2

Python version

3.10.11

Cython version

Cython 3.0.0b3

Additional context

No response

[da-woods]

Thanks for the report. Can reproduce this. Just to make clear (since it wasn't 100% clear to me from the issue) it's the '-X ...' argument that seems to trigger it. A simple cython -3 filename.pyx looks to work fine.

[matusvalo]

Issue is caused by following lines:

cython/Cython/Compiler/Options.py

Lines 654 to 655 in 0605b26

	if 'language_level' in directives and 'language_level' not in kw:
	options['language_level'] = directives['language_level']

when -X switch is used, directives variable contains dictionary with directives containing also language_level set to None. Hence the options dictionary with key language_level is set to None instead of 3.

[lithomas1]

Thanks for the quick fix!