如何在文件中搜索输入并在函数中打印它们

def search_and_print(file_name, keyword):
    try:
        with open(file_name, 'r') as file:
            content = file.read()
            occurrences = content.count(keyword)
            if occurrences > 0:
                print("找到了 %d 个与关键词 '%s' 相关的结果：" % (occurrences, keyword))
                lines = content.split('\n')
                for line in lines:
                    if keyword in line:
                        print(line)
            else:
                print("未找到与关键词 '%s' 相关的结果。" % keyword)
    except FileNotFoundError:
        print("文件 '%s' 不存在。" % file_name)

search_and_print('file.txt', '函数')