Answers for "append rows to a csv file python"

python csv write add new line

with open('output.csv', 'w', newline='n', encoding='utf-8') as f:
    writer = csv.writer(f)
    ...

python csv add row

import csv   

fields=['first','second','third']

with open(r'name', 'a') as f:
    writer = csv.writer(f)
    writer.writerow(fields)