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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.