Duplicates in Python
From the Pandas cheat sheet · Missing and Duplicate Data · verified Aug 2026
Duplicates
Detect and remove repeated records.
python
df.duplicated().sum()
df = df.drop_duplicates()📌 Define duplicates using business keys
💡 keep=False reveals every duplicate row
🔍 Sort before keeping the latest record
🎯 Inspect duplicates before deleting them
duplicatescleaningdrop-duplicates
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