如何根据它们的关联值从文本文件中提取公共行？

def extract_common_lines(file_path):
    lines = []
    common_lines = []
    
    # 读取文本文件并解析内容
    with open(file_path, 'r') as file:
        for line in file:
            lines.append(line.strip())  # 去除每行的换行符并存储到列表中
    
    # 提取公共行
    for line in lines:
        if lines.count(line) > 1 and line not in common_lines:
            common_lines.append(line)
    
    return common_lines

# 示例用法
file_path = 'text_file.txt'
common_lines = extract_common_lines(file_path)

# 输出结果
for line in common_lines:
    print(line)