CODEWITHSUNDEEP
pythonjson
Federico
Federico

Reputation: 1157

Scrambled JSON string

I'm trying to build a JSON string using json python module.

In particular I want this structure:

data = {
    'Id' : deviceId,
    'UnixTime' : unixTime,
    'Temp' : round( temperature, 2 ),
    'Rh' : round( humidity,2 ),
}

But when I execute: jsonString = json.dumps( data )

All field are scrambled.

Any Suggestion?

Upvotes: 1

Views: 816

Answers (1)

SerialDev
SerialDev

Reputation: 2847

Both Python dict and JSON object are unordered collections.

Use the sort_keys parameter, to sort the keys:

>>> import json
>>> json.dumps({'a': 1, 'b': 2})
'{"b": 2, "a": 1}'
>>> json.dumps({'a': 1, 'b': 2}, sort_keys=True)
'{"a": 1, "b": 2}'

If you need a particular order; you could use collections.OrderedDict:

>>> from collections import OrderedDict
>>> json.dumps(OrderedDict([("a", 1), ("b", 2)]))
'{"a": 1, "b": 2}'
>>> json.dumps(OrderedDict([("b", 2), ("a", 1)]))
'{"b": 2, "a": 1}'

Upvotes: 3

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