Should add that pl.expr.sum() replaces None with 0

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Open lmocsi opened 12 hours ago

lmocsi commented 12 hours ago

Pl.expr.sum() documentation (https://docs.pola.rs/api/python/dev/reference/expressions/api/polars.Expr.sum.html) should mention, that resulting None values are replaced with 0 (so you do not have to add .fill_null(0) ).

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mcrumiller commented 8 hours ago

See #17527 for more discussion on this matter.