Python: for loops: using an index from a list and another index from another list

Question

I would like to loop as something like:

for j in range(1,4) and for k in ['one', 'two', 'three']:
               print(str(j) + ' is written ' + k)

I tried with and but it didn't work. How does someone get this effect?

And what would happen in the case that the two lists have different lengths? How could I still iterate through both of them?

Cory Kramer · Accepted Answer · 2017-07-04 14:57:05Z

7

You can use zip

for j, k in zip(range(1,4), ['one', 'two', 'three']):
    print('{} is written {}'.format(j, k))    

1 is written one
2 is written two
3 is written three

If one is longer than the other, you could consider using itertools.zip_longest

answered Jul 4, 2017 at 14:57

Cory Kramer

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Comments

inspectorG4dget · Accepted Answer · 2017-07-04 14:59:10Z

7

Check this out:

for j,k in enumerate(['one', 'two', 'three'], 1):
    print("{} is written {}".format(j, k))

answered Jul 4, 2017 at 14:59

inspectorG4dget

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Comments

ForceBru · Accepted Answer · 2017-07-04 14:58:15Z

4

You should zip 'em all!

for j, k in zip(range(1,4), ("one", "two", "three")):
    # use j and k

edited Jul 4, 2017 at 14:58

answered Jul 4, 2017 at 14:56

ForceBru

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3 Comments

idjaw Over a year ago

I choose you zipachu!

ForceBru Over a year ago

Why two downvotes?? You don't like Pokémon? Or the zip function?

idjaw Over a year ago

Not the downvoter, but I think there might be debate between which answer might be better between zip and enumerate.

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