Python-day7-集合和字典

1，官网的数据类类型介绍：https://docs.python.org/zh-cn/3/library/stdtypes.html#mapping-types-dict

2，Runoob的集合介绍：https://www.runoob.com/python3/python3-set.html#setmethod

3，Runoob的字典介绍：https://www.runoob.com/python3/python3-dictionary.html