Sum of two or more columns of pandas dataframe in python

Sum of two or more columns of pandas dataframe in python is carried out using + operator. Lets see how to

  • Sum the two columns of a pandas dataframe in python
  • Sum more than two columns of a pandas dataframe in python

With an example of each

First let’s create a dataframe


import pandas as pd
import numpy as np

#Create a DataFrame
df1 = {
     'Name':['George','Andrea','micheal','maggie','Ravi','Xien','Jalpa'],
   'Mathematics1_score':[62,47,55,74,32,77,86],
   'Mathematics2_score':[45,78,44,89,66,49,72],
   'Science_score':[56,52,45,88,33,90,47]}

df1 = pd.DataFrame(df1,columns=['Name','Mathematics1_score','Mathematics2_score','Science_score'])

print(df1)

df1 will be

Sum of two or more columns of pandas dataframe in python 1

 

Sum of two columns of a pandas dataframe in python

Sum of two mathematics score is computed using simple + operator  and stored in the new column namely Mathematics_score as shown below


df1['Mathematics_score']=df1['Mathematics1_score'] + df1['Mathematics2_score']
print(df1)

so resultant dataframe will be (Mathematics1_score + Mathematics2_score)

Sum of two or more columns of pandas dataframe in python 2

 

Sum of more than two columns of a pandas dataframe in python

Sum of all the score is computed using simple + operator and stored in the new column namely total_score as shown below


df1['total_score']=df1['Mathematics1_score'] + df1['Mathematics2_score']+ df1['Science_score']
print(df1)

so resultant dataframe will be

Sum of two or more columns of pandas dataframe in python 3

 

Sum of two or more columns of pandas dataframe in python                                                                                                                Sum of two or more columns of pandas dataframe in python