Convert String Representation Of Array To Actual Array In Python

Question

I am quite new to python , and am struggling to make this work.

I need to convert

["ladksa dlskdlsd slkd sldks lskds lskds","skkdsdl skdsl lskds lsdk sldk sdslkds"] - String Representation of Array To Actual Array Like this.
[0]-> "ladksa dlskdlsd slkd sldks lskds lskds"
[1]-> "skkdsdl skdsl lskds lsdk sldk sdslkds"

I have tried following things:

json.load(array) -> but it gave me parse array error
literal_eval(x) -> read it somewhere (dont know why it doesn't work)

Error:

custom_classes = json.loads(element.custom_classes)
 File "C:\Users\Shri\AppData\Local\Programs\Python\Python38-32\lib\json\__init_
.py", line 357, in loads
 return _default_decoder.decode(s)
 File "C:\Users\Shri\AppData\Local\Programs\Python\Python38-32\lib\json\decoder
py", line 337, in decode
 obj, end = self.raw_decode(s, idx=_w(s, 0).end())
 File "C:\Users\Shri\AppData\Local\Programs\Python\Python38-32\lib\json\decoder
py", line 355, in raw_decode
 raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 2 (char 1)

Also, I am using below js code to send data:

'custom_classes':'\''+JSON.stringify(finalized_classes)+'\'',

Data Is Stored as : Please check image here

and

arr_element = array of Objects For Specific Class

which has a property

custom_classes -> which is stored as above image.

and i am doing:

for element in arr_element:
 string_obj = json.loads(str(element.custom_classes))
 //here it is error

Please help

• mousetail: What error do you get when you try json.load()? Or literal_eval()? You need to post your errors so we can help you.
• Adam Tokarski: Use json.loads instead of json.load
• mousetail: The last line of your error is missing

Answer 1

import json
s = '["ladksa dlskdlsd slkd sldks lskds lskds","skkdsdl skdsl lskds lsdk sldk sdslkds"]'
json.loads(s)
# gives ['ladksa dlskdlsd slkd sldks lskds lskds', 'skkdsdl skdsl lskds lsdk sldk sdslkds']

• Shriniket Shrikant Deshmukh: your codes does work. but i am still facing issue when i am retrieving it from model
• Adam Tokarski: Ok, please add to question what exactly is at element.custom_classes.
• Shriniket Shrikant Deshmukh: Hi, i have added info in question.
• Adam Tokarski: Thanks, I rather meant to print like for example print('element.custom_classes') and maybe type(element.custom_classes).

Answer 2

After you use json.loads(), you can use str.split() to turn the strings into arrays, and then append one of the arrays onto the other if you need to.

foo = ['this is a sentence', 'this is a different sentence']
bar = foo[0].split(' ')
biz = foo[1].split(' ')
bar.append(biz)
print(bar)

Result: ['this', 'is', 'a', 'sentence', 'this', 'is', 'a', 'different', 'sentence']