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Python Python Collections (Retired) Tuples Combo

michaelabendroth
michaelabendroth
4,561 Points
Posted by michaelabendroth
michaelabendroth
4,561 Points

How to iterate over 2 enumerated iterables with a for loop?

I have been stuck on this one for 2 days - checked python documentation and stack overflow and still can't figure this one out. The question asks to create a function that takes 2 iterables and creates a list of tuples with the values from each list. How do you iterate over 2 enumerated iterables? I can't find the syntax for this anywhere so I'm guessing my approach is basically wrong.

zippy.py 
# combo(['swallow', 'snake', 'parrot'], 'abc')
# Output:
# [('swallow', 'a'), ('snake', 'b'), ('parrot', 'c')]
# If you use list.append(), you'll want to pass it a tuple of new values.
# Using enumerate() here can save you a variable or two.
def combo(it_one, it_two):
  a_list = []
  for value in (enumerate(it_one[1]), enumerate(it_two[1])):
    a_list.append((value(it_one), value(it_two)))
  return a_list

1 Answer

sangsatori
sangsatori
2,761 Points

This seems to work.

The trick for a short & sweet solution is the fact that you get given two iterables, at the same length - so you can skip iterating over the second one and just access it by index directly; it will be the right value anyway.

You seem to be using iterators incorrectly.

There's also some other confusing parts about your code. Just... take a look at the solution and rethink the steps, good luck!

michaelabendroth
michaelabendroth
4,561 Points
michaelabendroth
michaelabendroth
4,561 Points

I was driving myself nuts with this one -that's why the code looks so crazy. Thanks for the advice, it makes perfect sense now.