dataframe distinct values python code example

Example 1: how to get distinct value in a column dataframe in python

df.column.unique()

Example 2: pandas count distinct values in column

#column name ISSDTM
pd.to_datetime(df.ISSDTM, errors='coerce').dt.year

#result
0    2013
1    2013
2    2009
3    2009
Name: ISSDTM, dtype: int64