count unique values dataframe python code example
Example 1: count unique pandas
df['column'].nunique()
Example 2: 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: int64
Example 3: dataframe unique values in each column
for col in df:
print(df[col].unique())
Example 4: pandas count unique values in column
df.nunique()