""" 和文件相关的类定义 """ import json from data_define import Record # 先定义一个抽象类用来做顶层设计,确定有哪些功能需要实现 class FileReader: def read_data(self) -> list[Record]: """读取文件的数据,读到的每一条数据都转换为Record对象,将它们都封装到list内返回即可""" pass class TextFileReader(FileReader): def __init__(self, path): self.path = path # 定义成员变量记录文件的路径 # 复写(实现抽象方法)父类的方法 def read_data(self) -> list[Record]: f = open(self.path, "r", encoding="UTF-8") record_list: list[Record] = [] for line in f.readlines(): line = line.strip() # 消除读取到的每一行数据中的\n data_list = line.split(",") record = Record(data_list[0], data_list[1], int(data_list[2]), data_list[3]) record_list.append(record) f.close() return record_list class JsonFileReader(FileReader): def __init__(self, path): self.path = path # 定义成员变量记录文件的路径 def read_data(self) -> list[Record]: f = open(self.path, "r", encoding="UTF-8") record_list: list[Record] = [] for line in f.readlines(): data_dict = json.loads(line) record = Record(data_dict["date"], data_dict["order_id"], int(data_dict["money"]), data_dict["province"]) record_list.append(record) f.close() return record_list if __name__ == '__main__': text_file_reader = TextFileReader( "/Users/qinyingjie/Documents/idea-workspace/study/python-demo/data/对象/2011年1月销售数据.txt") json_file_reader = JsonFileReader( "/Users/qinyingjie/Documents/idea-workspace/study/python-demo/data/对象/2011年2月销售数据JSON.txt") list1 = text_file_reader.read_data() list2 = json_file_reader.read_data() for l in list1: print(l) for l in list2: print(l)