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df.groupby()

AI & DATA SCIENCE // df-groupby

Group DataFrame using a mapper or by a Series of columns.

Syntax

grouped = df.groupby('A').sum()

Examples

Example 01Basic Usage
grouped = df.groupby('A').sum()

Best Practices

  • Use vectorized operations over iterations (e.g. iterrows()) for performance.
  • Always verify memory usage when loading large files.