convert a text list into list on python

Question

I'm reading lists that have lost their format while conversions, so the orinial list looks now like:

my_list = '[[-0.2226099967956543, 0.2235500067472458, -0.2384900003671646, 0.14377999305725098]]'

for that I'm doing the following:

my_list = my_list.replace('[','').replace('[','').split()
type(my_list)
list

Which works, but doesn't looks very pythonic to me. Is thera better option?

score 2 · Answer 1 · answered Jun 11 '19 at 01:22

2

So we have ast

my_list = '[-0.2226099967956543, 0.2235500067472458, -0.2384900003671646, 0.14377999305725098]'
import ast
ast.literal_eval(my_list)
Out[567]: 
[-0.2226099967956543,
 0.2235500067472458,
 -0.2384900003671646,
 0.14377999305725098]

answered Jun 11 '19 at 01:22

BENY

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Haha, lucky we both had different solutions :P, i didn't see yours when posting... i was hoping you weren't using `json.loads` :P – U13-Forward Jun 11 '19 at 01:23
1

@U9-Forward ah :-) nice solution – BENY Jun 11 '19 at 01:24
Yeah, https://stackoverflow.com/questions/21223392/why-is-json-loads-an-order-of-magnitude-faster-than-ast-literal-eval – U13-Forward Jun 11 '19 at 01:24

U13-Forward · Accepted Answer · 2019-06-11T01:26:11.277

2

Use json.loads, also, I added an extra bracket at the end of my_list since it's missing a bracket:

>>> import json
>>> my_list = '[[-0.2226099967956543, 0.2235500067472458, -0.2384900003671646, 0.14377999305725098]]'
>>> json.loads(my_list)
[[-0.2226099967956543, 0.2235500067472458, -0.2384900003671646, 0.14377999305725098]]
>>> type(json.loads(my_list))
<class 'list'>
>>>

edited Jun 11 '19 at 01:26

answered Jun 11 '19 at 01:22

U13-Forward

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Note the string list in question has an (intentional?) bracket missing. – TrebledJ Jun 11 '19 at 01:24
@TrebledJ I added one... – U13-Forward Jun 11 '19 at 01:25

convert a text list into list on python

2 Answers2