How to Count Duplicates in Pandas DataFrame

You can count duplicates in pandas DataFrame by using this method: df.pivot_table(index=[‘DataFrame Column’], aggfunc=’size’) Next, I’ll review the following 3 cases to demonstrate how to count duplicates in pandas DataFrame: (1) under a single column (2) across multiple columns (3) when having NaN values in the DataFrame 3 Cases of Counting Duplicates in Pandas DataFrame …