Update cython requirement from <4,>=3.0 to >=3.2.5,<4 in /sdks/python

[dependabot]

Updates the requirements on cython to permit the latest version.

Changelog

Sourced from cython's changelog.

3.2.5 (2026-05-23)

Bugs fixed

• A compile failure was fixed when using the walrus operator inside of try-except. (Github issue :issue:7462)

• Expressions with side-effects as object argument to isinstance() could get evaluated multiple times, e.g. when they use the walrus operator. (Github issue :issue:7670)

• Several problems generating the shared utility module were resolved, including a performance regression with memory views. (Github issues :issue:7487, :issue:7497, :issue:7504, :issue:7558)

• Some GC and refcounting issues were resolved for Cython functions in the Limited API. (Github issue :issue:7594)

• Refcounting errors and error handling issues were resolved in some rare error handling cases. (Github issues :issue:7597, :issue:7599, :issue:7612, :issue:7673)

• Using cython.pymutex in an extension type with cdef methods generated invalid C code missing the required PyMutex declarations. (Github issue :issue:6995)

• Calling .get_frame() on Cython coroutines could crash in freethreading Python. (Github issue :issue:7632)

• The vectorcall protocol was not used correctly in .throw() of Cython coroutines when raising the exception only by type (without value or traceback). (Github issue :issue:7677)

• A problem with cpdef enums in the Limited API of Python 3.11+ was resolved. (Github issue :issue:7503)

• Unicode predicates like .isdigit() are now allowed to fail in the Limited API. (Github issue :issue:7602)

• Conditional expressions mixing Python float and int object types could accidentally infer float as the common result type, instead of treating both independently.

• Using sizeof() in the size declarations of extern arrays failed. (Github issue :issue:7451)

• Enabling profiling generated invalid C code for non-Python return tuples. (Github issue :issue:7580)

• abs() on C long long values could generate invalid C code.

... (truncated)

Commits

• ec15209 Tests: Fix test in Py3.16, following cython/cython#7709
• aa576c4 Fix test.
• 2398ddd Prepare release of 3.2.5.
• abb261f Update changelog.
• a4bae70 Small cleanup of memoryview assertion (GH-7635)
• 80d9e7e Prevent walrus operator from being re-evaluated multiple times in isinstance(...
• 0c69532 CI: Pip PyPy 3.11 version to avoid CI failures.
• f7d6b7a CI: Allow longer PyPy version strings than "major.minor".
• b7a1d43 Update changelog.
• f02df0a Build: Remove outdated license identifier (long replaced by license kw-opti...
• Additional commits viewable in compare view

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[derrickaw]

@dependabot rebase

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.39%. Comparing base (d901481) to head (8c6bca0).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #38626   +/-   ##
=========================================
  Coverage     58.38%   58.39%           
  Complexity    14637    14637           
=========================================
  Files          2725     2725           
  Lines        271438   271474   +36     
  Branches      11884    11884           
=========================================
+ Hits         158490   158531   +41     
+ Misses       106801   106796    -5     
  Partials       6147     6147           

Flag	Coverage Δ
python	79.89% <ø> (+0.01%)	⬆️

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