Joining 2 lists ,Python

Question

How do I join 2 lists with elements side by side? For example:

list1 = ["they" , "are" ,"really" , "angry"]  
list2 = ["they" , "are" ,"seriously" , "angry"]

I want output as:

list3 = [("they","they"),("are","are"),("really","seriously"),("angry","angry")]

The above looks like a list tuples though, and if the above list were columns with each word in a row, how would I append list2 to list1?

Using [zip](http://docs.python.org/2/library/functions.html#zip). — Yuushi, Feb 13 '14 at 11:53
Perhaps worth mentioning that if the lists are of uneven length, `zip` will discard the remaining elements of the longer list. You can use [itertools.izip_longest](http://docs.python.org/2/library/itertools.html#itertools.izip_longest) if this is the case. — msvalkon, Feb 13 '14 at 12:04

score 10 · Accepted Answer · answered Feb 13 '14 at 11:53

10

Use zip():

>>> list1 = ["they" , "are" ,"really" , "angry"]  
>>> list2 = ["they" , "are" ,"seriously" , "angry"] 
>>> list3 = zip(list1, list2)
>>> list3
[('they', 'they'), ('are', 'are'), ('really', 'seriously'), ('angry', 'angry')]

answered Feb 13 '14 at 11:53

TerryA

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what if i have 2 columns instead?? – Hypothetical Ninja Feb 13 '14 at 12:46

score 3 · Answer 2 · answered Feb 13 '14 at 12:08

3

This is another solution,

>>> [ (val,list2[idx]) for idx, val in enumerate(list1)]
[('they', 'they'), ('are', 'are'), ('really', 'seriously'), ('angry', 'angry')]

By the way zip() is a good solution.

answered Feb 13 '14 at 12:08

Adem Öztaş

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Joining 2 lists ,Python

2 Answers2