count unique observations python excel code example

Example 1: how to count unique values in a column dataframe in python

dataframe.column.nunique()

Example 2: count unique values pandas

df['hID'].nunique()
5

Example 3: pandas count distinct values in a column

Series.value_counts(self, normalize=False, sort=True, ascending=False, bins=None, dropna=True)

Example 4: pandas count unique values in column

df.nunique()