zwwzzwwz1的博客

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

a = 1 b = 1 print(a is b) c = 1000 d = 1000 print(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 json dict = {'id':1, 'name':'alan', 'sex':'man'} # dict_to_json json_data = json.dumps(dict) # json_to_dict dict_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dict wit

```python class Node(object): def __init__(self, data): ''' data:数据 next:指向下一个节点 ''' self.data = data self.next = None class Single_LinkList(obje...