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python 列表转为字典的两个小办法

1、如今有两个列表，list1 = [key1,key2,key3]和list2 = [1,2,3]，把他们转为这样的字典：{key1:1,key2:2,key3:3}

>>>list1 = [key1,key2,key3]

>>>list2 = [1,2,3]

>>>dict(zip(list1,list2))

{key1:1,key2:2,key3:3}

2、将嵌套列表转为字典，有两种办法，

>>>new_list= [[key1,value1],[key2,value2],[key3,value3]]

>>>dict(list)

{key3: value3, key2: value2, key1: value1}

或者这样：

>>>new_list= [[key1,value1],[key2,value2],[key3,value3]]

>>>new_dict = {}

>>> for i in new_list:

...   new_dict[i[0]] = i[1]                #字典赋值，左边为key，右边为value

...

>>> new_dict

{key3: value3, key2: value2, key1: value1}