Diez B. Roggisch wrote:
> py wrote:
>
>> I have two lists which I want to use to create a dictionary. List x
>> would be the keys, and list y is the values.
>>
>> x = [1,2,3,4,5]
>> y = ['a','b','c','d','e']
>>
>> Any suggestions? looking for an efficent simple way to do this...maybe
>> i am just having a brain fart...i feel like this is quit simple.
>
> dict(zip(x,y))
>
> Diez
I'd even suggest using izip (from itertools), it's often much faster
than zip (end result is the same).
Demo:
>>> from itertools import izip
>>> l1 = range(5000)
>>> l2 = range(5000, 10000)
>>> from timeit import Timer
>>> t1 = Timer("dict(zip(l1, l2))", "from __main__ import l1, l2")
>>> t2 = Timer("dict(izip(l1, l2))", "from __main__ import l1, l2, izip")
>>> min(t1.repeat(5, 10000))
17.989041903370406
>>> min(t2.repeat(5, 10000))
10.381146486494799
>>>
42% speed gain from using izip instead of zip (memory was not an issue
during the test, machine had 1.3Gb of available ram)
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