用python写一个脚本，读取srt文件中的内容，并打印出重复的内容，且将不重复的内容保存到新文件中

代码：

# 定义一个函数来处理文件
def process_file(src_filename, unique_filename):
    seen = set()
    duplicates = set()
    with open(src_filename, 'r', encoding='utf-8') as file:
        for line in file:
            # 将读取的行转换为小写，以避免大小写差异导致的重复
            normalized_line = line.strip().lower()
            if normalized_line in seen:
                duplicates.add(normalized_line)
            else:
                seen.add(normalized_line)

    # 打印重复的行
    for dup in duplicates:
        print(f"Duplicate: {dup}")

    # 将不重复的行写入新文件
    with open(unique_filename, 'w', encoding='utf-8') as file:
        for line in seen:
            file.write(line + '\n')


# 调用函数，指定源文件和新文件的名称
process_file('zhong.srt', 'unique.srt')