So I have a list of python formatted like:
x = ['[1,2,3]', '[4,5,6,]', ...]
Is there a way to convert the "inner lists" to actual lists? So the output would be
x = [[1,2,3], [4,5,6], ....]
Thanks!
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3 Answers
Another example with json:
>>> import json
>>> x = ['[1,2,3]', '[4,5,6]']
>>> [json.loads(y) for y in x]
[[1, 2, 3], [4, 5, 6]]
Please limit your strings to dicts and lists only.
1 Comment
Ahmed
I accepted this answer versus the one proposed by khelwood (his solution did also solve my problem) because my full code already uses the json library.
You can use ast.literal_eval for this kind of conversion. You can use map to apply the conversion to each element of your list.
from ast import literal_eval
x = ['[1,2,3]', '[4,5,6,]']
x = map(literal_eval, x)
print x
gives
[[1, 2, 3], [4, 5, 6]]
1 Comment
Muhammad Mehran Khan Attari
ast.literal_eval is great and it converts many types, but it'll give error if the list has any tags (i.e. <tag> etc)You can use eval to evaluate strings as code.
x = ['[1,2,3]', '[4,5,6,]']
y = [eval(s) for s in x]
1 Comment
khelwood
Use of
eval is generally discouraged.