[FIXED] How to append i'th element of a list to first entry in i'th list in list of lists?

Issue

That is: each element in a list ends up as the first element in the corresponding list in a list of lists.

Like the following:

List_of_Lists = [[1,2,3],[2,3,4],[4,4,4]]
List1 = [1,2,3]

Resulting:

New_List_of_List = [[1,1,2,3][2,2,3,4],[3,4,4,4]]

I have tried various append and insert methods, but the main problem is that I'm not sure how to mash up individual lists in List_of_Lists and elements in List.

Solution

You can insert the elements at the 0 position

lists = [[1,2,3],[2,3,4],[4,4,4]]
List1 = [1,2,3]
for i in range(len(lists)):
    
     lists[i].insert(0,List1[i])
print(lists)

Output:

[[1, 1, 2, 3], [2, 2, 3, 4], [3, 4, 4, 4]]

Answered By - user15801675

Answer Checked By - Dawn Plyler (PHPFixing Volunteer)