Python - Add a zero column to Pandas DataFrame

To add a zero column to a Pandas DataFrame, use the square bracket and set it to 0. At first, import te required library −

import pandas as pd

Create a DataFrame with 3 columns −

dataFrame = pd.DataFrame(
   {
      "Student": ['Jack', 'Robin', 'Ted', 'Marc', 'Scarlett', 'Kat', 'John'],"Result": ['Pass', 'Fail', 'Pass', 'Fail', 'Pass', 'Pass', 'Pass'],"Roll Number": [ 5, 10, 3, 8, 2, 9, 6]
   }
)

Create a new column with zero entries −

dataFrame['ZeroColumn'] = 0

Example

Following is the code −

import pandas as pd

# Create DataFrame
dataFrame = pd.DataFrame(
   {
      "Student": ['Jack', 'Robin', 'Ted', 'Marc', 'Scarlett', 'Kat', 'John'],"Result": ['Pass', 'Fail', 'Pass', 'Fail', 'Pass', 'Pass', 'Pass'],"Roll Number": [ 5, 10, 3, 8, 2, 9, 6]
   }
)

print"DataFrame ...\n",dataFrame

dataFrame['ZeroColumn'] = 0

print"\nUpdated DataFrame ...\n",dataFrame

Output

This will produce the following output −

DataFrame ...
   Result   Roll Number   Student
0    Pass             5      Jack
1    Fail            10     Robin
2    Pass             3       Ted
3    Fail             8      Marc
4    Pass             2  Scarlett
5    Pass             9       Kat
6    Pass             6      John

Updated DataFrame ...
   Result   Roll Number   Student   ZeroColumn
0    Pass             5      Jack            0
1    Fail            10     Robin            0
2    Pass             3       Ted            0
3    Fail             8      Marc            0
4    Pass             2  Scarlett            0
5    Pass             9       Kat            0
6    Pass             6      John            0