Let there be a string list_string = '[1,2,3]' the desired output would be the list inside the string, but not as a string bus as a list list_list = [1,2,3]
What is the easiest way to achieve this?
3 Answers
json module might be what you are looking for.
import json
list_string = '[1,2,3]'
list_list = json.loads(list_string)
print(list_list) # [1, 2, 3]
print(list_list[0]) # 1
You can just call eval if you are very sure the string can be converted into list and does not contain dangerous code:
>> eval('[1,2,3]') == [1, 2, 3]
# True
One easy way would be to slice off the brackets and then use split:
>>> list_string = '[1,2,3]'
>>> list_list = list_string[1:-1].split(',')
>>> list_list
['1', '2', '3']
>>> list_list2 = [int(x) for x in list_string[1:-1].split(',')]
>>> list_list2
[1, 2, 3]
>>> list_list3 = list(map(int, list_string[1:-1].split(',')))
>>> list_list3
[1, 2, 3]
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