zwwzzwwz1的博客

参考链接：https://www.cnblogs.com/hello-/articles/8177836.html

a = 1b = 1print(a is b)c = 1000d = 1000print(c is d)print(id([1])==id([1]))print(id([1])==id([2,3]))x = 'hello'y = 'hello'print(x is y)x1 = 'hello world'y1 = 'hello world'print(x1 is y1)在py文件运行上面代码都是True,在交互式输入执行：>>> c = 1000&

原文链接：http://blog.kissdata.com/2014/05/23/python-with.html

import jsondict = {'id':1, 'name':'alan', 'sex':'man'}# dict_to_jsonjson_data = json.dumps(dict)# json_to_dictdict_data = json.loads(json_data)# 字典转json然后写入到文件，文件不存在自动创建with open('a.json', 'w') as f: json.dump(dict, f)# 读取json文件转换为dictwit

```pythonclass Node(object): def __init__(self, data): ''' data:数据 next:指向下一个节点 ''' self.data = data self.next = Noneclass Single_LinkList(obje...