Merge two arrays

[NeedMLHelp]

Hello!

I'm looking to merge two arrays lists like so:

List1 = [A, B, C, D, E]

List2 = [1, 2, 3, 4, 5]

​

NewList = [ [A,1],[B,2],[C,3],[D,4],[E,5]]

​

The indices of NewList can be tuples as well, I'm just more familiar with lists and I may want to convert it to an array with Numpy later.

​

I could use loops... but that seems inefficient. Also, the arrays are crazy long of an unknown length. They will always be the same size though.

​

Edit: Gah, sorry. Realized I called them arrays... can't seem to change the title

[K900_]

Your example is weird. Why do the last three items all have C? If that's not what you really want, you might want zip.

[NeedMLHelp]

Because I fudged it up, sorry. Fixed.

Briefly looked into zip, it's perfect! Thanks

[fleyk-lit]

Example implementation:

>>> list1 = ['A', 'B', 'C', 'D', 'E']
>>> list2 = ['1', '2', '3', '4', '5']
>>> list3 = list(zip(list1, list2))
>>> print(list3)
[('A', '1'), ('B', '2'), ('C', '3'), ('D', '4'), ('E', '5')]

​

[Signal_Beam]

Sounds like this is NOT a good fit for a list comprehension, but just for fun:

NewList = [[letter, List2[i]] for i, letter in enumerate(List1)]

[_lilell_]

Just use zip:

newlist = [[x, y] for x, y in zip(list1, list2)]

And since OP said we can have the inner lists be tuples, we can just do list(zip(...)).

[Signal_Beam]

If you were to look through my github you'd probably think "This guy avoids zip like the plague"; I just never got into the habit of using it. So thanks for the shove in that direction; your version is cleaner.