Merging simple lists into a nested list

Language Help Python
1

Hi All!

I may have missed it/forgotten from the basic lessons, but I need help merging two or more lists into a single list of nested lists.

For example, if I have
l1 = [1, 2, 3]
l2 = [a, b, c]

I would like the output to be:
l3 = [[a, 1], [b, 2], [c, 3]]

I know how to use the zip() function, but the output there are tuples and I want to be able to combine the lists in a way that can be further extracted or edited. Obviously, just rewriting a nested list is easy when the number of items is small, but I am trying to this with lists that are 20 items or more each.

Thank you all in advance for your help!

2

This may work to create an array that contains arrays made from each item ascending the index of the initial array (i.e. l1)

l1 = [1, 2, 3]
l2 = ["a", "b", "c"]

def func(l1, l2):
    x, outputarray = 0, []
    while x < len(l1):
        outputarray.append([l1[x],l2[x]])
        x+=1
    return outputarray 

resultingarray = func(l1, l2)
print("resultingarray is", resultingarray)