Python

Search

add an index column in range dataframe

df = df.loc[df.index.repeat(df['a'])]   
df['c'] = df.groupby(level=0).cumcount() + 1
df = df.reset_index(drop=True)
print (df)
   a  b  c
0  1  x  1
1  2  y  1
2  2  y  2
3  3  z  1
4  3  z  2
5  3  z  3

Comment

PREVIOUS	NEXT

Code Example
Python :: pyton for
Python :: python create empty dictionary with keys
Python :: python array use numpy arange
Python :: how to make a screen in pygame
Python :: math in python
Python :: Tree: Inorder Traversal
Python :: round down number python
Python :: python get an online file
Python :: python re
Python :: python string to boolean
Python :: get dataframe name python
Python :: how to store a return value in a variable in python
Python :: where python packages are installed
Python :: address already in use
Python :: fraction in python
Python :: how to find last element in array python
Python :: avoid self python by making class functions static
Python :: df.rename(index=str, columns={"A": "a", "C": "c"}) what does index=str means
Python :: python if loop
Python :: use of self in pythonic class
Python :: hide password in python
Python :: python how to add 2 numbers
Python :: dataframe cut
Python :: Odd number without loop in python
Python :: python loop over list
Python :: python bigquery example
Python :: python one sample t-test
Python :: editing specific line in text file in python
Python :: get status code python
Python :: pyhon

Search

PYTHON

add an index column in range dataframe

ADD CONTENT