How to iterate through two lists in parallel using auxiliary variable with changing increments?

Question

I have two lists in Python, like this:

RG = [30, 30, 30, 50, 50, 50, 70, 70, 80, 80, 80]
EC = [2, 2, 2, 25, 25, 25, 30, 30, 10, 10, 10]

and I want to iterate over then with an auxiliar variable, like i, because when some condition is met (like EC is different of RG), I want that this iteration go to another element that it's not the next one. Like:

for i in ?:
    // code
    if EC != RG:
        i = i + 5;
    // code

I already saw zip function, but I didn't found how to do this using it, because this function is an iterable.

`for i in range(zip(RG, EC)): if EC[i] != RG[i]: i=i+5; # code` — WiseDev, Aug 12 '19 at 13:59
@BlueRineS i got ``TypeError: 'zip' object cannot be interpreted as an integer`` — mhery, Aug 12 '19 at 14:06
@BlueRineS now I got ``TypeError: object of type 'zip' has no len()`` — mhery, Aug 12 '19 at 14:10
@BlueRineS now I got ``TypeError: 'int' object is not iterable``, but kabanus answer helped me. thanks for your attention! — mhery, Aug 12 '19 at 15:22

score 2 · Accepted Answer · edited Jan 20 '21 at 17:18

2

A for loop is not useful if you do not want to iterate a container while jumping indices. In this case a while would be more conducive to your task:

i = 0
while i < len(RG):
    # code
    if EC[i] != RG[i]:
        i += 5;
    else: i += 1
    # code

edited Jan 20 '21 at 17:18

TehTris

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answered Aug 12 '19 at 14:01

kabanus

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How to iterate through two lists in parallel using auxiliary variable with changing increments?

1 Answers1