Xpath like query for nested python dictionaries

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One of the best libraries I’ve been able to identify, which, in addition, is very actively developed, is an extracted project from boto: JMESPath. It has a very powerful syntax of doing things that would normally take pages of code to express.

Here are some examples:

search('foo | bar', {"foo": {"bar": "baz"}}) -> "baz"
search('foo[*].bar | [0]', {
    "foo": [{"bar": ["first1", "second1"]},
            {"bar": ["first2", "second2"]}]}) -> ["first1", "second1"]
search('foo | [0]', {"foo": [0, 1, 2]}) -> [0]

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