converting array to and from string in python 3.7.2

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Is there any reason why you use array and not list(common way in most cases)?
Usage of array look at this answer.

>>> lst = ['g','e','e','k']
>>> lst
['g', 'e', 'e', 'k']
>>> type(lst)
<class 'list'>
>>> 
>>> ''.join(lst)
'geek'