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python 列表转为字典的两个小方法(小结)

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1、现在有两个列表,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,有两种方法,

>>>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'}

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