pandas unique count groupby code example
Example 1: pandas groupby column count distinct values
# Pandas group by a column looking at the count unique/count distinct values of another column
df.groupby('param')['group'].nunique()
Example 2: pandas groupby count unique rows
ID, domain
123, 'vk.com'
123, 'vk.com'
123, 'twitter.com'
456, 'vk.com'
456, 'facebook.com'
456, 'vk.com'
456, 'google.com'
789, 'twitter.com'
789, 'vk.com'