如何使用python将值添加到csv文件中已有的行

import csv

with open('file.csv', 'r') as file:
    reader = csv.reader(file)
    rows = list(reader)

target_row = None
for row in rows:
    if row[0] == 'target_value':
        target_row = row
        break

target_row.append('new_value')

with open('file.csv', 'w', newline='') as file:
    writer = csv.writer(file)
    writer.writerows(rows)

import csv

with open('file.csv', 'r') as file:
    reader = csv.reader(file)
    rows = list(reader)

target_row = None
for row in rows:
    if row[0] == 'target_value':
        target_row = row
        break

target_row.append('new_value')

with open('file.csv', 'w', newline='') as file:
    writer = csv.writer(file)
    writer.writerows(rows)