Make Dictionary From 2 List [duplicate]

问题

Possible Duplicate:
Map two lists into a dictionary in Python

trying to make dictionary with 2 list one being the key and one being the value but I'm having a problem. This is what I have so far:

d={}
for num in range(10):
    for nbr in range(len(key)):
        d[num]=key[nbr]

say my key is a list from 1 to 9 and value list is [2,4,0,9,6,6,8,6,4,5] how do i assign so it that its like {0:2, 1:4, etc...}

回答1:

zip() to the rescue!

>>> k = range(1,10)   # or some list or iterable of sorts
>>> v = [2,4,0,9,6,6,8,6,4,5]
>>> d = dict(zip(k,v))
>>> d
{1: 2, 2: 4, 3: 0, 4: 9, 5: 6, 6: 6, 7: 8, 8: 6, 9: 4}
>>>

For more details, see zip() built-in function, in Python documentation.

Note, regarding range() and the list of "keys".
The question reads "key is a list from 1 to 9" (i.e. 9 distinct keys) but the value list shows 10 distinct values. This provides the opportunity to discuss two points of "detail":

the range() function in the snippet above will produce the 1 through 9 range, that is because the starting value (1, here), if provided, is always included, whereas the ending value (10, here) is never included.
the zip() function stops after the iteration which includes the last item of the shortest iterable (in our case, omitting '5', the last value of the list)

回答2:

If you are mapping indexes specifically, use the enumerate builtin function instead of zip/range.

dict(enumerate([2,4,0,9,6,6,8,6,4,5]))

回答3:

values = [2,4,0,9,6,6,8,6,4,5]
d = dict(zip(range(10), values))

回答4:

mydict = dict(zip(range(10), [2,4,0,9,6,6,8,6,4,5]))

回答5:

should be something like

dict(zip(a,b))

来源：https://stackoverflow.com/questions/1793154/make-dictionary-from-2-list

标签

python

list

dictionary