extract a dictionary from a dictionary

Question

I have a dictionary which has the following structure in a python program {'John':{'age': '12', 'height':'152', 'weight':'45}}, this is the result returned from a function.

My question is how may I extract the sub-dictionary please? so that I can have the data in this form only {'age': '12', 'height':'152', 'weight':'45}.

*I can think of a solution of using for loop to go through the dictionary, since there is only one item in this dictionary, I can then store it into a new variable, but I could like to learn an alternative please

Many thanks

Did you try `d["John"]`? Or if there is only one value and you don't know the key just pull it from .values. `next(iter(d.values()))` or `d[next(iter(d))]` — Padraic Cunningham, Oct 18 '16 at 22:53

score 2 · Answer 1 · answered Oct 18 '16 at 22:54

2

To get a value from a dictionary, use dict[key]:

>>> d = {'John':{'age': '12', 'height':'152', 'weight':'45'}}
>>> d['John']
{'age': '12', 'height': '152', 'weight': '45'}
>>>

answered Oct 18 '16 at 22:54

rassar

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score -1 · Answer 2 · answered Oct 18 '16 at 22:59

-1

>>> d = {'John':{'age': '12', 'height':'152', 'weight':'45'}, 'Kim':{'age': '13', 'height': '113', 'weight': '30'}}
>>> for key in d:
...     print(key, d[key])
... 
John {'height': '152', 'weight': '45', 'age': '12'}
Kim {'height': '113', 'weight': '30', 'age': '13'}

Just access the subdictionary with d[key]. If you have multiple keys, something like the above loop will allow you to go through all of them.

answered Oct 18 '16 at 22:59

blacksite

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i think this is the solution, thanks! – Victor Oct 19 '16 at 22:49
Please vote up and mark this answer as accepted if you think it's the solution :) – blacksite Oct 20 '16 at 00:02

extract a dictionary from a dictionary

2 Answers2