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docs(python): Document dropping non-existent column causes Exception now in v1 upgrade guide #18046

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docs(python): Document dropping non-existent column causes Exception now in v1 upgrade guide #18046

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docs(python): Dropping non-existent column causes failure
DeflateAwning Aug 5, 2024
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Add comment about `strict=False` from review
DeflateAwning Aug 5, 2024
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6 changes: 6 additions & 0 deletions docs/releases/upgrade/1.md
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Expand Up @@ -1047,6 +1047,12 @@ After:
pip install 'polars[calamine,async,graph]'
```

### `df.drop('non_existent_column')` now raises a `ColumnNotFoundError`

Previously, dropping a non-existent column would silently ignore the non-existent column. Now, an error is raised.
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To restore the old behavior (ignore non-existent columns), pass `strict=False`.

## Deprecations

### Issue `PerformanceWarning` when LazyFrame properties `schema/dtypes/columns/width` are used
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