def _lookup_key_by_dot_notation(obj, lookup_key): first_key_element, rest = lookup_key.split('.', 2) if first_key_element not in obj: raise Exception('Invalid key lookup, key {} does not exist'.format(lookup_key)) if rest == '': return obj[first_key_element] else: return _lookup_key_by_dot_notation(obj[first_key_element], rest) d = {"location":{"_id":"foo"}} print _lookup_key_by_dot_notation(d)
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