pandas find unique values in column code example
Example 1: how to get distinct value in a column dataframe in python
df.column.unique()
Example 2: pandas unique values in column
df.name.unique()
Example 3: 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 4: dataframe python unique values rows
df.drop_duplicates()
Example 5: python extract values that have different values in a column
df = pd.DataFrame({'author':['a', 'a', 'b'], 'products':['sr1', 'sr2', 'sr2']})
group = df.groupby('author')
df2 = group.apply(lambda x: x['subreddit'].unique())
df2 = df2.apply(pd.Series)
Example 6: pandas count unique values in column
df.nunique()