Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Python Python Collections (2016, retired 2019) Tuples Combo

Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points
Posted by Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points

combo function challenge

My code only applies to only two arguments but I'm hoping my code's on the right track. Any advice? Thanks!

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

def combo(tuple1,tuple2):
    tuple_list=[]
    for i, letter in enumerate(tuple2,start=1):
        number=tuple1[i]
        finaltuple=(number,letter)
        tuple_list.append(finaltuple)
    return tuple_list

1 Answer

Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points
Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points

Thanks for pointing that out. I don't see a need to do that. But I'm wondering how to make this function work on more than two arguments.

Alex Koumparos
seal-mask
.a{fill-rule:evenodd;}techdegree
Alex Koumparos
Python Development Techdegree Student 36,862 Points
Alex Koumparos
.a{fill-rule:evenodd;}techdegree
Alex Koumparos
Python Development Techdegree Student 36,862 Points

Hi Leo,

To make the function work with an arbitrary number of inputs, you would change the function signature from something like:

def combo(itr1, itr2):

to something like:

def combo(*args):

Then inside the function you could do something like:

    new_list = []  # initialise a new list
    list_length = len(args[0])
    tuple_length = len(args)

    for i in range(list_length):
        new_tuple = []  # we need the tuple to start out as a list so we can mutate it
        for j in range(tuple_length):
            new_tuple.append(args[j][i])
        new_tuple = tuple(new_tuple) # now we make it a tuple like the question wants
        new_list.append(new_tuple)
    return new_list

You would use it like this:

>>> combo([1, 2, 3], 'cat', ('a', 'b', 'c')
[(1, 'c', 'a'), (2, 'a', 'b'), (3, 't', 'c')]

Hope that makes sense,

Happy coding

Alex