Fix for issue #19
Created by: rameshrvr
Unittest results on python 2 & 3
M281649SBH03Q:nested-lookup ramesh_rv$ python -m unittest test_nested_lookup test_lookup_api
..............................................
----------------------------------------------------------------------
Ran 46 tests in 0.005s
OK
M281649SBH03Q:nested-lookup ramesh_rv$ pytest
================================================================= test session starts =================================================================
platform darwin -- Python 3.7.0, pytest-4.5.0, py-1.8.0, pluggy-0.11.0
rootdir: /Users/ramesh_rv/Documents/Github/python_packages/nested-lookup
collected 46 items
test_lookup_api.py ............................ [ 60%]
test_nested_lookup.py .................. [100%]
============================================================== 46 passed in 0.11 seconds ==============================================================