python csv define headers code example

Example 1: how to add headers in csv file using python

import csv

f = open("fruits.csv", "w")
writer = csv.DictWriter(
    f, fieldnames=["fruit", "count"])
writer.writeheader()
f.close()
Outputfruits.csvfruit,count

Example 2: how to add header in csv file in python

from pandas import read_csv

   df = read_csv('test.csv')
   df.columns = ['a', 'b']
   df.to_csv('test_2.csv')