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fix: parse timezone-aware datetime strings as UTC consistently across backends #2166

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Merged
merged 15 commits into from
Mar 7, 2025

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MarcoGorelli
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What type of PR is this? (check all applicable)

  • πŸ’Ύ Refactor
  • ✨ Feature
  • πŸ› Bug Fix
  • πŸ”§ Optimization
  • πŸ“ Documentation
  • βœ… Test
  • 🐳 Other

Related issues

  • Related issue #<issue number>
  • Closes #<issue number>

Checklist

  • Code follows style guide (ruff)
  • Tests added
  • Documented the changes

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@MarcoGorelli MarcoGorelli marked this pull request as ready for review March 7, 2025 20:47
if "pandas" in str(constructor) and PANDAS_VERSION < (1,):
# "Cannot pass a tz argument when parsing strings with timezone information."
pytest.skip()
if "pyarrow_table" in str(constructor) and is_windows():
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Hate to be the windows guy but ...

narwhals/tests/utils.py

Lines 170 to 172 in caaa840

def is_pyarrow_windows_no_tzdata(constructor: Constructor, /) -> bool:
"""Skip test on Windows when the tz database is not configured."""
return "pyarrow" in str(constructor) and is_windows() and not windows_has_tzdata()

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I think that util needs updating to use "pyarrow_table" actually

My bad 🀦

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yup, thanks!

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Oh it turns out I accidentally had the right thing lol https://github.com/narwhals-dev/narwhals/actions/runs/13730338881/job/38405984916?pr=2166

Double my bad 🀦🀦

needs reverting (fdb2f48)

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@MarcoGorelli fyi I un-resolved this

tests/utils.py Outdated
@@ -169,4 +169,6 @@ def windows_has_tzdata() -> bool: # pragma: no cover

def is_pyarrow_windows_no_tzdata(constructor: Constructor, /) -> bool:
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Truly unfortunate name I settled on here 😭

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Thanks @MarcoGorelli

@dangotbanned dangotbanned added bug: incorrect result Something isn't working fix labels Mar 7, 2025
@MarcoGorelli
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thanks for your review!

@MarcoGorelli MarcoGorelli merged commit 1c512e2 into narwhals-dev:main Mar 7, 2025
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2 participants