extracting data from JSON object with python

Question

I am trying to get data into SAMPLES and LABELS variables from JSON objects which looks like this.

{
"samples": [
    [
        28,
        25,
        95
    ],
    [
        21,
        13,
        70
    ],
    [
        13,
        21,
        70
    ]
],
"labels": [
    1,
    2,
    3
  ]
 }

the code I am using

with open(data, 'r') as d:
complete_data = json.load(d)
for a in complete_data:
    samples = a['samples']
    lables = a['lables']

but its says

samples = a['samples']

TypeError: string indices must be integers

remove the for-loop - use samples = complete_data['samples'], etc — Ed Ward
– Ed Ward, Commented Feb 18, 2020 at 14:47
You trying to use string representation of a dictionary. You should convert it yo dictionary first. Use ast.literal_eval to convert dictionary — ikibir
– ikibir, Commented Feb 18, 2020 at 14:48
@ikibir, I searched about ast.literal_eval, it says it is used to evaluate the input, to check if it is valid or not. can you please guide me more about it? — Abdullah
– Abdullah, Commented Feb 18, 2020 at 15:02
@EdWard, your solution worked, I took the variables out of with block and it worked. Thank you so much — Abdullah
– Abdullah, Commented Feb 18, 2020 at 15:07

Dmitry Shevchenko · Accepted Answer · 2020-02-18 14:55:23Z

1

To get data from 'samples' and 'labels' You don't need to use loop. Try this:

import json

with open('data.json', 'r') as d:
    complete_data = json.load(d)

samples = complete_data['samples']
labels = complete_data['labels']

print(samples)
print(labels)

Output:

[[28, 25, 95], [21, 13, 70], [13, 21, 70]]
[1, 2, 3]

answered Feb 18, 2020 at 14:55

Dmitry Shevchenko

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