OpenStack Debug Python Unit Test using pdb

OpenStack Debug Python Unit Test using pdb
1)
Add following statements in Unit Test Code where you want to debug
import pdb

2)

OR

Run the test with "testtools" instead of "testr"

a)
#source .venv/bin/activate

b)
If you are using "Tox" environment
#source .tox/py27/bin/activate

[DantalionNl]

The proposed solution to debug with the Tox environment does not work.