如何在python中用file2中的行替换file1中的指定行

with open('file1.txt', 'r') as f1:
    content1 = f1.readlines()

with open('file2.txt', 'r') as f2:
    content2 = f2.readlines()

line_number_to_replace = 3  # 要替换的行数，这里以第3行为例

content1[line_number_to_replace - 1] = content2[line_number_to_replace - 1]

with open('file1.txt', 'w') as f1:
    f1.writelines(content1)