Python: parse json list

Question

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?

for gas in gasses.items():

Jason Hu
– Jason Hu

2015-03-16 16:03:00 +00:00
Commented Mar 16, 2015 at 16:03 — Jason Hu
– Jason Hu, Commented Mar 16, 2015 at 16:03
also, you have a typo ,is yield not yeild

levi
– levi

2015-03-16 16:04:37 +00:00
Commented Mar 16, 2015 at 16:04 — levi
– levi, Commented Mar 16, 2015 at 16:04

Eugene Soldatov · Accepted Answer · 2015-03-16 16:04:17Z

1

Like this:

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

answered Mar 16, 2015 at 16:04

Eugene Soldatov

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Comments

Tobias · Accepted Answer · 2015-03-16 16:07:24Z

0

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

answered Mar 16, 2015 at 16:07

Tobias

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Comments

jesterjunk · Accepted Answer · 2015-10-22 22:39:08Z

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

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