Convert a python list to string (the list includes some strings)

Question

I hope to convert a list of strings to a list of a long string. For example, I hope to convert ['c++', 'python', 'sklearn', 'java'] to ["'c++', 'python', 'sklearn', 'java'"]. Namely, the original list have some strings, the target list should have a long string which includes the small string.

I have tried the ' '.join([str(elem) for elem in s]), but the results are not in a list.

s = ['c++', 'python', 'sklearn', 'java']
listToStr = ' '.join([str(elem) for elem in s])
print listToStr

The expected output is:

["'c++', 'python', 'sklearn', 'java'"]

The actual output is:

c++ python sklearn java

I can't resist asking why you would want to do this.

BallpointBen
– BallpointBen

2019-09-27 22:10:45 +00:00
Commented Sep 27, 2019 at 22:10 — BallpointBen
– BallpointBen, Commented Sep 27, 2019 at 22:10

Jab · Accepted Answer · 2019-09-27 22:16:30Z

4

This can be done using one line of code and no loop/join by turning the list to a string and taking the brackets off. Then wrap it in a list.

print [str(s)[1:-1]]

answered Sep 27, 2019 at 22:16

Jab

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Comments

Simon Crane · Accepted Answer · 2019-09-27 22:18:22Z

2

Join it with commas, add the single quotes and put it in a list:

myList= [", ".join(["'"+elem+"'" for elem in s])]

edited Sep 27, 2019 at 22:18

answered Sep 27, 2019 at 22:11

Simon Crane

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3 Comments

ZaydH Over a year ago

I believe it should be ", ".join... based on his question.

askquestion628 Over a year ago

thanks, it should add the single quote and add "," before join.

DeepSpace Over a year ago

Not creating the inner list and using .format would be much more efficient. It also removes the burden of doing str(elem) (which I'm not sure why you did. Inputs are clearly strings) [", ".join("'{}'".format(elem) for elem in s)]

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