CODEWITHSUNDEEP
pythondictionary
biocompamateur
biocompamateur

Reputation: 35

Python - Mapping a Key to a Value that is a Map

Is it possible to map a string to a map in Python. For example, if I want a map that looks like:

mymap = { 'ABC': {'123' : 56}, 'DEF': {'456' : 92} }

Is this possible? How would I add a value to the map, or check the map to see what the value is of the 'inner map' if I am doing an iteration when mymap is empty (at the start of a loop, for example). Thanks!

Upvotes: 0

Views: 5861

Answers (2)

Paco H.
Paco H.

Reputation: 2054

Yes it's possible. If you aren't sure is mymap has elements and don't want to do a try except you can use the dict.get(key, default) method:

value = mymap.get('ABC', {}).get('123', None)
if values is not None:
    # Found key 123 inside mymap['ABC']
else:
    # mymap['123'] or mymap['123']['ABC'] doesn't exist

Upvotes: 0

pramod
pramod

Reputation: 1493

>>> from collections import defaultdict

>>> mymap = defaultdict(dict)
>>> mymap['ABC'] = {'123' : 56}
>>> mymap
defaultdict(<type 'dict'>, {'ABC': {'123': 56}})

can you try this snippet, hope this solves your purpose

Upvotes: 1

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