从文件中删除一行及其前一行

def delete_lines(filename, target_line):
    # 读取文件内容
    with open(filename, 'r') as file:
        lines = file.readlines()

    # 找到目标行及其前一行，并删除
    i = 0
    while i < len(lines):
        if lines[i].strip() == target_line:
            del lines[i-1:i+1]
            break
        i += 1

    # 重写文件
    with open(filename, 'w') as file:
        file.writelines(lines)

# 使用示例
filename = 'example.txt'
target_line = '目标行的内容'
delete_lines(filename, target_line)