Changing values of dictionary to integers

Question

I'm currently setting up a dictionary and am attempting to convert the values associated with a key from strings to integers. So I'm trying to go from this:

    {'Georgia': ['18', '13', '8', '14']}

To this:

    {'Georgia': [18, 13, 8, 14]}

Any ideas on how I would go about doing this?

Did you try to look this up at all? http://stackoverflow.com/q/379906/2615940 http://stackoverflow.com/q/4291236/2615940 — skrrgwasme, Apr 09 '16 at 22:24

Pythonista · Answer 1 · 2016-04-09T22:35:45.263

1

You can do this:

map is taking the values from the iterable in this case the value of the dictionaries key and casting every item in the iterable to an int. map returns a map object instead of a list so we are converting it back to a list.

a_dict = {'Georgia': ['18', '13', '8', '14']}
a_dict['Georgia'] = list(map(int, a_dict['Georgia']))

Or, if you need to convert multiple values this way you can use a loop:

 for k,v in list(a_dict.items()):
     a_dict[k] = list(map(int, v))

edited Apr 09 '16 at 22:35

answered Apr 09 '16 at 22:17

Pythonista

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Like Raymond's answer, you should add some comments or explanation of how the code works. – skrrgwasme Apr 09 '16 at 22:34

score 1 · Answer 2 · answered Apr 09 '16 at 22:21

1

>>> old =  {'Georgia': ['18', '13', '8', '14']}
>>> new = {key: list(map(int, value)) for key, value in old.items()}
>>> new
{'Georgia': [18, 13, 8, 14]}

answered Apr 09 '16 at 22:21

Raymond Hettinger

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It would be good to add an explanation of why and how this works. – skrrgwasme Apr 09 '16 at 22:30

Changing values of dictionary to integers

2 Answers2