如何在文本文件中查找重复项并打印该行？

def find_duplicates(file_path):
    seen = set()
    duplicates = set()

    with open(file_path, 'r') as file:
        for line in file:
            if line in seen:
                duplicates.add(line)
            else:
                seen.add(line)

    return duplicates

def main():
    file_path = 'example.txt'  # 替换为你的文件路径
    duplicates = find_duplicates(file_path)

    if duplicates:
        print("重复的行如下：")
        for line in duplicates:
            print(line.strip())
    else:
        print("没有找到重复的行。")

if __name__ == "__main__":
    main()