write_csv.py

import csv # Required lib


with open('test.csv', 'w', encoding='utf-8') as csv_file:
    field_names = ['field_01', 'field_02', 'field_03']
    csv_writer = csv.DictWriter(csv_file, delimiter='|', fieldnames=fieldnames, lineterminator='\n')
    csv_writer.writerow({'field_01' : 'example', 'field_02' : 'example 2', 'field_03' : 'example 3'})
    csv_file.close()