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 (Retired) Tuples Combo

Mona Jalal
Mona Jalal
4,302 Points

zip doesn't work

why the following doesn't work?

def combo(iter1, iter2): return zip(iter1, iter2)

zippy.py
# combo([1, 2, 3], 'abc')
# Output:
# [(1, 'a'), (2, 'b'), (3, 'c')]
# If you use .append(), you'll want to pass it a tuple of new values.
def combo(iter1, iter2):
    return zip(iter1, iter2)

2 Answers

The only thing that you are missing is that you will need to make it into a list. Other than that you are good.

# combo([1, 2, 3], 'abc')
# Output:
# [(1, 'a'), (2, 'b'), (3, 'c')]
# If you use .append(), you'll want to pass it a tuple of new values.

def combo(iter1, iter2):
    return list(zip(iter1, iter2))

Here is another way you could do it. This way doesn't use zip. Instead it just appends to a list.

# combo([1, 2, 3], 'abc')
# Output:
# [(1, 'a'), (2, 'b'), (3, 'c')]
# If you use .append(), you'll want to pass it a tuple of new values.

def combo(iter1, iter2):
    return_list = []
    for item in range(len(iter1)):
        return_list.append((iter1[item], iter2[item]))
    return return_list