This topic describes how to implement a business class, so that one of its properties is calculated based on a property(ies) of the objects contained in the child object collection. 本主题介绍如何实现 Business 类,以便基于子对象集合中包含的对象的属性计算其属性之一. Tip 提示 A complete sa…
把json的数据写入到文件中 import json with open('data.json','w+') as f: json.dump({"name":"张彪"},f) 把json的数据从文件中读取出来 import json with open('data.json','r') as f: x=json.load(f) print(x,type(x))…