python count number of values without dupicalte in a second column values

Solutions on MaxInterview for python count number of values without dupicalte in a second column values by the best coders in the world

Search
showing results for - "python count number of values without dupicalte in a second column values"
Mats
15 Jan 2017
1ID, domain
2123, 'vk.com'
3123, 'vk.com'
4123, 'twitter.com'
5456, 'vk.com'
6456, 'facebook.com'
7456, 'vk.com'
8456, 'google.com'
9789, 'twitter.com'
10789, 'vk.com'
11
12df = df.groupby('domain')['ID'].nunique()
13print (df)
14
15domain
16'facebook.com'    1
17'google.com'      1
18'twitter.com'     2
19'vk.com'          3
source
similar questions
python count total numeber of row in a dataframefind the number of nan per column pandaspandas count consecutive valuescount how many duplicates python pandaspandas count specific value in columncount duplicates in one column pandasfind duplicated rows with respect to multiple columns pandaskeep only one duplicate in pandaspython count number of occurence in a columncount specific instances in a columb in pandaspd count how many item occurs in another columnhow to check for duplicates in a column in pythonhow to count number of unique values in a column pythonpandas add count of repeated elements from columnpython count how many unique in a column
queries leading to this page
total number of duplicate values in the dataframehow to see how manz duplicate values in a column pandaspython count number of values without dupicalte in a second column valuesmethod to calculate the repition in pandaspython count number of values without dupicalte in a second column values