How do I group data in a Pandas DataFrame?

How do I group data in a Pandas DataFrame?

You can use the groupby() function in Pandas to group data. What specific operation do you want to perform after grouping?

I want to calculate the average of a specific column after grouping.

You can do that by chaining the mean() function after groupby(). For example: df.groupby('column_name').mean().

Can I group by multiple columns?

Yes, you can group by multiple columns by passing a list to groupby(), like this: df.groupby(['col1', 'col2']).mean().

What if I want to apply different functions to different columns?

You can use the agg() function to apply different aggregation functions to different columns. For example: df.groupby('col1').agg({'col2': 'mean', 'col3': 'sum'}).