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fix maketrans #5824

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Merged
merged 1 commit into from
Jun 23, 2025
Merged

fix maketrans #5824

merged 1 commit into from
Jun 23, 2025

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@youknowone youknowone commented Jun 23, 2025 •
edited by coderabbitai bot
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Summary by CodeRabbit

  • Bug Fixes
    • Improved error handling for string translation tables by providing clearer error messages when invalid key types are used.
  • Tests
    • Updated test suite to treat the maketrans translate test as a normal test, ensuring more accurate test coverage.

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coderabbitai bot commented Jun 23, 2025 •
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Walkthrough

The changes remove the expected failure marker from a Unicode translation test in Python's test suite and update the Rust implementation of string translation to add stricter type validation for translation table keys, returning a type error for invalid key types.

Changes

File(s) Change Summary
Lib/test/test_unicode.py Removed @unittest.expectedFailure decorator and related comment from test_maketrans_translate.
vm/src/builtins/str.rs Added explicit type error for non-string, non-integer keys in maketrans translation table.

Poem

A test once marked as sure to fail
Now stands alone, both strong and hale.
Rusty strings check key types tight—
No more odd keys slip by at night!
With stricter code and tests that run,
This bunny hops—another job well done!
🐇✨

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  • Lib/test/test_unicode.py (0 hunks)
  • vm/src/builtins/str.rs (1 hunks)
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  • Lib/test/test_unicode.py
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🔇 Additional comments (1)
vm/src/builtins/str.rs (1)

1419-1422: LGTM! Excellent improvement in error handling and type validation.

This change enhances the maketrans method by adding explicit type validation for dictionary keys. Previously, keys that were neither integers nor strings would be silently ignored, which could lead to confusing behavior. Now it properly raises a TypeError with a clear, descriptive error message.

The implementation correctly:

  • Uses the appropriate error type (TypeError) for type validation failures
  • Provides a clear error message explaining the constraint
  • Follows Rust error handling patterns with early return
  • Improves function robustness and user experience
✨ Finishing Touches
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@youknowone youknowone merged commit 33af632 into RustPython:main Jun 23, 2025
11 of 12 checks passed
@youknowone youknowone deleted the str-maketrans branch June 23, 2025 02:43
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