Trying to point to a dynamic inventory script from within a project-local config file.

ansible-dynamic-inventory-config.txt

$ ansible --version
ansible 2.1.1.0
  config file = /Users/jramnani/path/to/ansible-playbooks/ansible.cfg
  configured module search path = Default w/o overrides
  
  
$ cat ansible.cfg
[default]
inventory=./inventory/ec2.py

And the winner is...? The section name was wrong in ansible.cfg. The section should be named [defaults] not [default]. Note the plural.