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python 列表(list)转为字典(dict)的两个小方法

2017-05-19 11:31:52 浏览:
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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