Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Python Collections (2016, retired 2019) Tuples Combo

Erlend Dybvik Indrelid
Erlend Dybvik Indrelid
5,843 Points
Posted by Erlend Dybvik Indrelid
Erlend Dybvik Indrelid
5,843 Points

Why isn't this code working: combo.py

I can't quite figure out why this code won't work. When having numbers as arguments the code works completely fine, but when having strings as arguments it causes an error. Why?

def combo(string1, string2):
    list3 = [string2]
    list1 = list(enumerate(list3, string1))
    return(list1)

Thanks

combo.py 
# combo([1, 2, 3], 'abc')
# Output:
# [(1, 'a'), (2, 'b'), (3, 'c')]

def combo(string1, string2):
    list3 = [string2]
    list1 = list(enumerate(list3, string1))
    return(list1)

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

The instructions tell you the function takes ordered iterables as arguments, such as tuples, lists, or strings. It should not operate on numbers, as they are not iterables.

Here's a few hints:

  • you might need a loop
  • you won't need "enumerate"
  • you're not allowed to use "zip"