要在python中映射的列表

Question

我有一个列表,我想将此列表转换为地图

mylist = ["a",1,"b",2,"c",3]

mylist相当于

mylist = [Key,Value,Key,Value,Key,Value]

所以输入:

mylist = ["a",1,"b",2,"c",3]

输出:

mymap = {"a":1,"b":2,"c":3}

PS:我已经编写了以下函数来完成同样的工作,但我想使用python的迭代器工具:

def fun():
    mylist = ["a",1,"b",2,"c",3]
    mymap={}
    count = 0
    for value in mylist:
        if not count%2:
            mymap[value] = mylist[count+1]
        count = count+1
    return mymap        

Answer 1

使用iter和字典理解:

>>> mylist = ["a",1,"b",2,"c",3]
>>> it = iter(mylist)
>>> {k: next(it) for k in it}
{'a': 1, 'c': 3, 'b': 2}

使用zip和iter:

>>> dict(zip(*[iter(mylist)]*2)) #use `itertools.izip` if the list is huge.
{'a': 1, 'c': 3, 'b': 2}

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