@Burhanudin Badiuzaman​ :

I am sorry to here that you are still getting errors!

If you're still encountering the error, it's possible that there is still a circular import somewhere in your code or in the databricks_test_helper package. Here are a few things you can try:

1. Check your code for circular imports: Make sure that none of your modules are importing from each other in a circular way. Circular imports can cause strange errors like this one, so it's important to avoid them.
2. Upgrade the databricks_test_helper package: Make sure that you have the latest version of the package installed. You can do this by running pip install --upgrade databricks_test_helper
3. Restart the kernel: Sometimes, restarting the kernel can help resolve issues like this. Try restarting the kernel and running your code again.
4. Use a different package or approach: If none of the above solutions work, you might consider using a different testing package or approach. There are many testing frameworks available for Python, so you might try one of those instead. Alternatively, you might consider writing your own testing functions instead of using databricks_test_helper