Answers for "group by using pandas"

0

group by pandas to list

df.groupby('a')['b'].apply(list)
Posted by: Guest on April-26-2021
0

groupby

df['frequency'] = df['county'].map(df['county'].value_counts())

    county  frequency
1   N       5
2   N       5
3   C       1
4   N       5
5   S       1
6   N       5
7   N       5
Posted by: Guest on August-11-2021

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