Unverified50% confidenceFactExact time
Pandas chained indexing (e.g., df[df['col']>0]['val']=1) cannot guarantee whether the slice returns a view or a copy; if a copy is returned, the assignment does not modify the original DataFrame and no error is raised.
1
Sources
50%
Confidence
Long-term
Relevance
10/12/2026
First Seen
Sources
Related Entities
Related Claims
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