print number of unique values in a column pandas code example

Example 1: count unique pandas

df['column'].nunique()

Example 2: pandas count the number of unique values in a column

df['hID'].nunique()
5

Example 3: how to count unique values in a column dataframe in python

dataframe.column.nunique()

Example 4: dataframe number of unique rows

1
# get the unique values (rows) by retaining last row
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df.drop_duplicates(keep='last')