[limadog9]

Weighted fmean() currently divides a Decimal numerator by a float denominator, raising TypeError even when the data and weights have compatible types. Convert the numerator to float before division so these inputs produce the documented float result.

Following the approach suggested in the issue, clarify in the documentation and docstring that weighted inputs must support multiplication with each other. Mixed Decimal/float and Decimal/Fraction inputs remain unsupported. Add regression coverage for Decimal data, Decimal weights, and both together.

Fixes #131723.

Validation:

• All statistics tests on a free-threaded debug build: 401 tests, 5 skipped. The new regression fails before the fix.
• Full HTML documentation build with warnings treated as errors.
• Ruff, Sphinx lint, and patchcheck.

• Issue: statistics.fmean() does not support Decimal data, contrary to documentation #131723

[read-the-docs-community]

Documentation build overview

📚 cpython-previews | 🛠️ Build #35258461 | 📁 Comparing 5d47741 against main (0fba211)

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2 files changed

± library/statistics.html
± whatsnew/changelog.html