Question

How to add column to pandas DataFrame in Python

Answer 1

import pandas as pd
  
dict = {'name': ['Tom', 'Emmy', 'Axel'],
        'algebra': [91, 80, 94],
        'python': [98, 85, 96]}
  
df = pd.DataFrame(dict)

df['geometry'] = [75, 98, 80] # add column

print(df)
      
  
  
'''
run
  
   name  algebra  python  geometry
0   Tom       91      98        75
1  Emmy       80      85        98
2  Axel       94      96        80
  
'''

 

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Answer 2

import pandas as pd
   
df = pd.DataFrame(
    [['Tom', 91, 80, 94],
     ['Emmy', 98, 95, 96],
     ['Rubeus', 87, 81, 87],
     ['Dumbledore', 99, 100, 98],
     ['Axel', 75, 85, 90]],
    columns = ['name', 'algebra', 'python', 'java'])
   
df['c++'] = [75, 80, 90, 85, 95] # add column
 
print(df)

    
    
'''
run:
    
         name  algebra  python  java  c++
0         Tom       91      80    94   75
1        Emmy       98      95    96   80
2      Rubeus       87      81    87   90
3  Dumbledore       99     100    98   85
4        Axel       75      85    90   95
  
'''

 

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