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pythonarraysjson
yoonghm
yoonghm

Reputation: 4625

Python: parse json list

I have a json file, data.json

{
    "Nitrogen": [
        0.0173,
        0,
        0,
        0,
        28.0135
    ],
    "Oxygen": [
        0.0283,
        0,
        0,
        0,
        31.9988
    ]
}

I read the data like this:

import json

def read_data(path):
    with open(path, 'rU') as data:
        gasses = json.load(data)
        for gas in gasses:
            yield gas


if __name__ == '__main__':
    for row in read_data('data.json'):
        print(row)

It gives me

Nitrogen
Oxygen

How do I also get the value in the list instead?

Upvotes: 0

Views: 243

Answers (3)

jesterjunk
jesterjunk

Reputation: 2452

Working Example — Tested with Python 2.6.9 and 2.7.10 and 3.2.5 and 3.4.3 and 3.5.0

import json


def read_data(path):
    with open(path, 'rU') as data:
        gasses = json.load(data)
        for gas, values in gasses.items():
            yield gas
            for value in values:
                yield value


if __name__ == '__main__':
    for row in read_data('data.json'):
        print(row)

Output

Nitrogen
0.0173
0
0
0
28.0135
Oxygen
0.0283
0
0
0
31.9988

Upvotes: 0

Tobias
Tobias

Reputation: 514

gas points to the key of your dictionary. gasses[gas] gives you the value.

Upvotes: 0

Eugene Soldatov
Eugene Soldatov

Reputation: 10135

Like this:

gasses = json.load(data)
for gas, value in gasses.items():
    yield (gas, value)

Upvotes: 1

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