Pandas groupby size column name

import pandas as pd

df = pd.DataFrame({'A': ['x', 'x', 'x','y','y']
                , 'B': ['a', 'c', 'c','b','b']})
print (df)
   A  B
0  x  a
1  x  c
2  x  c
3  y  b
4  y  b

df = df.groupby(['A', 'B']).size().reset_index(name='Size')
print (df)
   A  B  Size
0  x  a     1
1  x  c     2
2  y  b     2

Source: stackoverflow.com

Similar codes

6 votes166 views1 answer
Unicodeencodeerror: 'charmap' codec can't encode characters in position 0-3: character maps to <undefined>
Python
12 votes227 views5 answers
Append python
Python
-1 vote204 views1 answer
Django migrate not creating tables
Python Django
1 vote182 views2 answers
How to import a library in python
Python
1 vote217 views1 answer
How to save a dictionary to excel in python
Python
6 votes189 views6 answers
ModuleNotFoundError: No module named 'Crypto'
Python
12 votes197 views2 answers
Isinstance float or int
Python
0 vote200 views1 answer
Gdscript fixed decimal
Python
0 vote189 views3 answers
How to print tables using python
Python
20 votes160 views6 answers
Python last item in list
Python