Adding lists with values of strings and integers in Python

Question

Is it possible to add two lists, with different value types in Python? Or is there an alternative way? For example:

listString = ['a','b','c','d']
listInt = [1,2,3,4]

I want to combine these so that the output string is either: finalString = [('a',1),('b',2),('c',3),('d',4)] or finalString = ['a',1,'b',2,'c',3,'d',4]

Are you guaranteed the lists are the same length? If so, `finalString = [(listString[i],listInt[i]) for i in range(listString)]` — Niema Moshiri, Jan 15 '18 at 04:30

user2390182 · Accepted Answer · 2018-01-15T04:35:56.753

0

Use zip:

listString = ['a','b','c','d']
listInt = [1,2,3,4]

list(zip(listString, listInt))
# [('a', 1), ('b', 2), ('c', 3), ('d', 4)]

And itertools.chain or a nested list comprehension for the flattened version:

from itertools import chain
list(chain(*zip(listString, listInt)))
# ['a', 1, 'b', 2, 'c', 3, 'd', 4]

[x for pair in zip(listString, listInt) for x in pair]
# ['a', 1, 'b', 2, 'c', 3, 'd', 4]

edited Jan 15 '18 at 04:35

answered Jan 15 '18 at 04:30

user2390182

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Adding lists with values of strings and integers in Python

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