字典基本操作方法

# -*- coding: utf-8 -*-
"""
Created on Fri Jul 24 09:37:44 2020

答疑： 李立宗  [email protected]
字典基本操作方法

"""


# 创建字典
a={'li':99,'zhang':66}
print(a)

# 打印指定key的value
print(a['li'])

# 添加key-value对
a['wang']=99
print(a)

# 删除key-value对
del a['zhang']
print(a)

# 修改key的value值
a['wang']=100
print(a)


# 判断是否在其中
print('wang' in a)
print('wong' not in a)