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unique values in dataframe column count
df.groupby('mID').agg(['count', 'size', 'nunique']).stack()
dID hID uID
mID
A count 5 5 5
size 5 5 5
nunique 3 5 5
B count 2 2 2
size 2 2 2
nunique 2 2 2
C count 1 1 1
size 1 1 1
nunique 1 1 1
Source: stackoverflow.com
how to count unique values in a column dataframe in python
dataframe.column.nunique()
Source: thispointer.com
count unique values pandas
df['hID'].nunique()
5
Source: stackoverflow.com
pandas count distinct values in a column
Series.value_counts(self, normalize=False, sort=True, ascending=False, bins=None, dropna=True)
Source: www.w3resource.com
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