Make a list of strings into a string with each value on a new line

Question

So, I have a project in which I have a list of strings:

outputs = ['cow', 'chicken', 'pig']

I need to turn them into a string, with each value separated by a newline, like so:

cow
chicken
pig

I found a solution at python list to newline separated value, but it uses a list like this:

outputs = [['cow'], ['chicken'], ['pig']]

and whenever I run:

 answer = "\n".join(map(lambda x: x[0], outputs))
 print(answer)

It returns 'c', as is the case with all the other answers in that question.

Oops, could not find that article you marked as duplicate. Sorry for using your time. — Decay X, Sep 28 '17 at 20:37

score 7 · Accepted Answer · answered Aug 31 '17 at 13:39

7

You can join a list of strings by another string by simply using:

str = "\n".join(outputs)

answered Aug 31 '17 at 13:39

Honza Zíka

score 1 · Answer 2 · answered Aug 31 '17 at 13:43

Your problem is that when you did:

map(lambda x: x[0], outputs)

You created an iterable consisting of the first letter of each element in outputs:

>>> outputs = ['cow', 'chicken', 'pig']
>>> list(map(lambda x: x[0], outputs))
['c', 'c', 'p']

Your over-thinking this. In this case, you don't even need to use map. You can simply use str.join:

'\n'.join(outputs)

2 Answers2