PathAccessor
This python module wraps the common "dicts-and-lists" flavor of python data structures such that each container tracks the access path from the root. The dicts-and-lists data structures are a common pattern, such as the result of parsing JSON.
Example
>>> from pathaccessor import MappingPathAccessor
>>> import json
>>>
>>> doc = json.loads("""
... {
... "title": "foo",
... "links": [
... {"text": "example", "url": "https://example.org"},
... {"text": "wikipedia", "url": "https://wikipedia.org"}
... ]
... }
... """)
>>> mpa = MappingPathAccessor(doc, 'jsondoc')
>>> print mpa["links"][1]["title"]
Traceback (most recent call last):
...
KeyError: "<MappingPathAccessor jsondoc['links'][1] {u'url': u'https://wikipedia.org', u'text': u'wikipedia'}> has no Key 'title'"
