Search for a key in a nested Python dictionary

Question

I have some Python dictionaries like this:

A = {id: {idnumber: condition},.... 

e.g.

A = {1: {11 : 567.54}, 2: {14 : 123.1         


        

Answer 1

dpath to the rescue.

http://github.com/akesterson/dpath-python

dpath lets you search by globs, which will get you what you want.

$ easy_install dpath
>>> for (path, value) in dpath.util.search(MY_DICT, '*/11', yielded=True):
>>> ... # 'value' will contain your condition; now do something with it.

It will iterate out all of the conditions in the dictionary, so no special looping constructs required.

See also

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• Python: Updating a value in a deeply nested dictionary
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• Chained, nested dict() get calls in python