python create csv and add row code example

Example 1: append record in csv

import csv   
fields=['first','second','third']
with open(r'name', 'a') as f:
    writer = csv.writer(f)
    writer.writerow(fields)

Example 2: writerows to existing csv python

import sys 
import os
import csv

listOfLines= [['[email protected]', '[email protected]', '[email protected]', '[email protected]', '[email protected]', '[email protected]']]

def write_to_csv(list_of_emails):
   with open('emails.csv', 'w', newline='') as csvfile:
       writer = csv.writer(csvfile, delimiter = ',')
       writer.writerows(list_of_emails)

write_to_csv(listOfLines)