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df.assign()

AI & DATA SCIENCE // df-assign

Assign new columns to a DataFrame.

Syntax

new_df = df.assign(C=df['A'] + df['B'])

Examples

Example 01Basic Usage
new_df = df.assign(C=df['A'] + df['B'])

Best Practices

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