count unique pandas
df['column'].nunique()get count of unique values in column pandas
df = df.groupby('domain')['ID'].nunique()
print (df)
domain
'facebook.com' 1
'google.com' 1
'twitter.com' 2
'vk.com' 3
Name: ID, dtype: int64pandas 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: int64Copyright © 2021 Codeinu
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