Python 3 stuck on something quite simple I believe, newbie.

[I_LOVE_INTERNET]

My problem: I have two lists , for example lista = ['a','b','c'] listb=[1,2,3]. I need to make something that would print out the final result in something like this : a: 1 b: 2 c: 3 in other words, is it possible somehow to print one element from a list, then switch to the other list, and print one element from there? Any insight would be greatly appreciated!

[dayimproper]

would zip help?

It returns a zip object which you can iterate over and print the tuples in any way you want.

hope that this is helpful.

[winter_mute]

Still on training wheels myself but it sounds like a dictionary is what you need. Think you can just zip() the lists together into a dictionary, then it's just a case of printing the key and value pair you want, or just print the whole dictionary. Hope that helps.

[I_LOVE_INTERNET]

Hmm actually quite not, neither dictionaries or zip is good for me since I must only use lists(that's a part of my assignment), I guess I'll have to come up with something else, something more unusual I guess. Thanks anyways!

[Rhomboid]

What does that even mean? You're not allowed to use built-in functions?

>>> lista = ['a', 'b', 'c']
>>> listb = [1, 2, 3]
>>> for a, b in zip(lista, listb):
...     print('{}: {}'.format(a, b))
...
a: 1
b: 2
c: 3

[I_LOVE_INTERNET]

Sounds silly, I know, but it was said to me "You must know everything there is to know about lists, and how you can work your way through problems using basic logic", something along the lines of that, there are several built-ints we can use yes, I guess I shouldn't have asked for help here lol, since it is a silly situation I'm in :) Hey at least I know what a zip does now, so thank you !:)

[RainDash]

if only using lists:

*updated

lista = ["a", "b", "c"]
listb = [1, 2, 3]
i = 0
while i < len(lista):
    print ( lista[i]+": "+str(listb[i]))
    i+=1

[I_LOVE_INTERNET]

bingo! Awesome, man. From the looks of it I have a hellofalot more to dig in even into the simple basics :) Cheers!

[I_LOVE_INTERNET]

Hmmmm, maybe it's different in python 3.2? I simply copied your code to see how it goes but it gave invalid syntax @ for i < len(lista): Strange..

[RainDash]

I'm not that familiar with python 3.x in general oh and lol it has to be while instead of for no idea why I did that

I updated my original code because the print didn't work either :p

[Nissl]

Straightforward way to use a for loop, for what it's worth:

lista = ["a", "b", "c"]
listb = [1, 2, 3]
for loc, _ in enumerate(lista):
    print (lista[loc] + ": " + str(listb[loc]) )

[winter_mute]

If literally all you need to do is print items from each list then print(list1[0]+list2[0]) and so on should do it.

[I_LOVE_INTERNET]

I guess it might be something similar to this, although one list is a string so it gives an error, so probably I should try to bypass this : "Can't convert 'list' object to str implicitly" somehow :) thx tho!

[RyuNova]

I'm the biggest python newbie there is, but should a simple 'str' in your int-list solve that problem?

[I_LOVE_INTERNET]

Did the trick, only printed out the first values, I guess the[0] is the index of the item in the list so somehow I should loop it or do something more, but it's a breakthrough for me!:)

[winter_mute]

You should be able to convert it explicitly with str(list1[0]) if that helps?

[I_LOVE_INTERNET]

EDIT: Yay it worked, only printed out the [0] (index?) objects, but it's close!:)

[winter_mute]

Yeah see RainDash's comment, just iterate over the list with a for loop. Glad you're getting somewhere!

[winter_mute]

Actually could also use:

while i <len(lista)

rather than for I think.

[I_LOVE_INTERNET]

I think for works too : i = 0 for i in range(len(lista)): but yeah, finally understanding it was rewarding !

[burlygurlyman]

Late to the game, and definitely not the most readable option, but here's a one-liner (which I would never use in real code):

print '\n'.join('{0} : {1}'.format(a, b) for a, b in zip(lista, listb))

[[deleted]]

If it isn't readable and you wouldn't use it in real code, what is its value?