python list unique values in column code example
Example 1: pandas unique values in column
df.name.unique()
Example 2: unique values in dataframe colume
df['Column_name'].value_counts()
Example 3: python list with only unique values
my_list = list(set(my_list))
Example 4: 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)