Python: Extract JSON keys

Question

I have the following JSON string:

jsonString = {'result': {'animals': {'Dogs': True, 'Cats': True}}

So in Python I know I can do:

animals= jsonString['result']['animals']

To get the value of 'Dogs' or 'Cats'. And:

animals= jsonString['result']['animals']['Dogs']

To get the value of 'Dogs' or 'Cats'.

However, when I try print (jsonString['result']['animals']) I get:

{'Dogs': True, 'Cats': True}

Question

How do I get the all the animals, without values, dynamically?

Thanks.

What result are you looking for? something like ['Dogs', 'Cats']? — mgilson
– mgilson, Commented Mar 9, 2016 at 15:06
you are actually using a dict and this has nothing to do with json, and I think you want .keys() to get the keys of the dict, however the print statement you provided is not a valid python command — Tadhg McDonald-Jensen
– Tadhg McDonald-Jensen, Commented Mar 9, 2016 at 15:09
Well, I should have mentioned .keys(). This returns the "dict_keys(['Dogs','Cats'])" output. I am looking for something like: ['Dogs', 'Cats'] — Portu
– Portu, Commented Mar 9, 2016 at 15:13
This is the answer list(jsonString["result"]["cats"].keys()) but accept Tadhg McDonald-Jensen's answer; it's more informative. — jDo
– jDo, Commented Mar 9, 2016 at 15:24

Tadhg McDonald-Jensen · Accepted Answer · 2016-03-09 15:28:53Z

3

First off when the data is loaded from json it creates a dict object, so all the methods described in the documentation are usable including keys:

print(jsonString['result']['cats'].keys())

you can see a list of all the possible methods with dir(dict) or dir(jsonString) and get help on any of them with the built in function:

>>> help(dict.keys)
Help on method_descriptor:

keys(...)
    D.keys() -> a set-like object providing a view on D's keys

edited Mar 9, 2016 at 15:28

answered Mar 9, 2016 at 15:13

Tadhg McDonald-Jensen

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