Data Interwine

Lists-Logic
1

1st list [A,B,C,D,E,F,G]
2nd list [1,2,3,4]

How to put every n item in the 2nd list after every m items in the 1st list?

If n=1, m=1, the result should be [A,1,B,2,C,3,D,E,F,G]
If n=1, m=2, the result should be [A,B,1,C,D,2,E,F,3,G]
If n=2, m=1, the result should be [A,1,2,B,3,4,C,D,E,F,G]
If n=2, m=2, the result should be [A,B,1,2,C,D,3,4,E,F,G]

2

You need something to indicate how the values should be assigned. If these are all unique values, a dictionary would be an appropriate approach, e.g.:

{'A': 1,
 'B': 2,
 'C': 3}

For your first example, the Python zip() function would work well, e.g.:

L1 = ['A', 'B', 'C']
L2 = [1, 2]
L3 = zip(L1, L2)

But for your second example, it is unclear how the value assignment is dictated. Why are ‘B’ and ‘D’ the only keys being assigned values?

3

Thanks for the suggestion.
For now, they are unique values.

Update:

  1. I figure that out, hope it will help someone.
  2. There should be more elegant ways to do this， please share if possible.
    Capture