unique values in dataframe column count

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Marilyn
23 Jun 2018
1df.groupby('mID').agg(['count', 'size', 'nunique']).stack()
2
3
4             dID  hID  uID
5mID                       
6A   count      5    5    5
7    size       5    5    5
8    nunique    3    5    5
9B   count      2    2    2
10    size       2    2    2
11    nunique    2    2    2
12C   count      1    1    1
13    size       1    1    1
14    nunique    1    1    1
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