AttributeError: module 'pandora' has no attribute 'util'

I have a github repo named pandora:

https://github.com/akshkr/pandora-python

In the test_case_refactor branch, I can't use submodules of pandora such as pn.util.misc.seed_everything() gives me the following error.

AttributeError: module 'pandora' has no attribute 'util'

I doubted circular imports so moved every import inside function wherever possible but didn't seem to work. And the test-cases written inside the module are passing.

Can someone tell me what exact issue is causing this AttributeError?