I highly recommened pudb, which is a full-screen, console-based visual debugger for Python. The user-interface is nicely designed for python developers.

Here is an example debugging a simple python script: Introduction to the PuDB Python Debugging Tool

Also, another great tutorial is from Jordi Gutiérrez Hermoso. Montreal, QC, September 14, 2015 - Jordi Gutiérrez Hermoso presents PuDB, a full-screen, console-based visual debugger for Python. An interesting comment from the speaker: > Everyone should use a debugger > … > > But If pdb is the only debugger you’ve every seen, I won’t blame you not using a debugger > > … > because the debugger is ugly, not because the source code is ugly

To install pudb on Debian/Ubuntu, you can use apt-get to install the package

# for python 2
sudo apt-get -y python-pudb
# for python 3
sudo apt-get -y python3-pudb

# pudb is even better when debugging with ipython
# so that's install ipython
sudo apt-get install ipython