python改变字幕-给只有数字的一行前加上换行符，并保存为新文件

代码：

def is_line_with_only_digits(line):
    # 检查一行是否只包含数字
    return line.strip().isdigit()

def process_file(input_file_path, output_file_path):
    with open(input_file_path, 'r', encoding='utf-8') as file:
        lines = file.readlines()

    with open(output_file_path, 'w', encoding='utf-8') as file:
        for line in lines:
            if is_line_with_only_digits(line):
                # 如果一行只包含数字，在它前面添加一个换行符
                file.write('\n' + line)
            else:
                file.write(line)

# 调用函数，替换下面的路径为你的文件路径
input_file_path = 'zhong.srt'
output_file_path = 'zhong_new.srt'
process_file(input_file_path, output_file_path)