CODEWITHSUNDEEP
pythondictionary
puncrazy
puncrazy

Reputation: 349

Extracting value from nested dictionary

My dictionary is like this:

query =  {'fowl': [{'cateogry': 'Space'}, {'cateogry': 'Movie'}, {'cateogry': 'six'}], u'Year of the Monkey': {'score': 40, 'match': [{'category': u'Movie'}, {'category': 'heaven'}, {'category': 'released'}]}}

fowl and Year of the Monkey are two entities in this. I am trying to extract all category values for both entities separately with no luck.

None of these work:

query[0] # I was expecting values for fowl
query[0]['category'] # I was expecting all category for fowl but seems wrong
query[0]['category'][0] # category space for fowl

what is the correct approach?

Upvotes: 0

Views: 101

Answers (3)

famousgarkin
famousgarkin

Reputation: 14126

Well, your query dictionary is rather funky, for one, 'fowl' and 'Year of the Monkey' values are not structured the same, so you cannot aply the same data access patterns, or categories being misspelled as 'cateogry'. If you can, you may be better off fixing that before trying to process it further.

As for extracting the 'fowl' data:

>>> query =  {'fowl': [{'cateogry': 'Space'}, {'cateogry': 'Movie'}, {'cateogry': 'six'}], u'Year of the Monkey': {'score': 40, 'match': [{'category': u'Movie'}, {'category': 'heaven'}, {'category': 'released'}]}}

>>> query['fowl'] # 'fowl'
[{'cateogry': 'Space'}, {'cateogry': 'Movie'}, {'cateogry': 'six'}]

>>> [d['cateogry'] for d in query['fowl']] # 'fowl' categories
['Space', 'Movie', 'six']

>>> [d['cateogry'] for d in query['fowl']][0] # 'fowl' 'Space' category
'Space'

Upvotes: 2

Umesha D
Umesha D

Reputation: 862

query['Year of the Monkey']['match'][0]['category'] you need to iterate

Upvotes: 1

Matti John
Matti John

Reputation: 20527

query is a dictionary not a list, so do query['fowl'] instead

Upvotes: 1

Related Questions