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Molkree opened this issue May 20, 2025 · 1 comment · May be fixed by #1228
Open

pandas.io.formats.style.Styler.map is missing #1226

Molkree opened this issue May 20, 2025 · 1 comment · May be fixed by #1228
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good first issue Styler conditional formatting using DataFrame.style

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@Molkree
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Molkree commented May 20, 2025 •
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Describe the bug
pandas.io.formats.style.Styler.map method is missing from the stub

To Reproduce

import pandas as pd

df = pd.DataFrame(data={"col1": [1, -2], "col2": [-3, 4]})
df.style.map(lambda v: "color: red;" if v < 0 else None)

Last line raises type checker errors. mypy: error: "Styler" has no attribute "map" [attr-defined], pylance: Cannot access attribute "map" for class "Styler"

Please complete the following information:

  • OS: WSL
  • OS Version [e.g. 22]: Ubuntu 2024
  • python version: 3.13
  • version of type checker: mypy 1.15.0/pylance 2025.5.1 with pyright 1.1.400
  • version of installed pandas-stubs: 2.2.3.250308 but the issue is present on the latest 93a9e11
@Dr-Irv
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Dr-Irv commented May 20, 2025

Thanks for the report. PR with tests welcome.

@Dr-Irv Dr-Irv added good first issue Styler conditional formatting using DataFrame.style labels May 20, 2025
@loicdiridollou loicdiridollou linked a pull request May 21, 2025 that will close this issue
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good first issue Styler conditional formatting using DataFrame.style
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GH1226 Add Styler.map to the stubs loicdiridollou/pandas-stubs
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@Molkree @Dr-Irv