Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Use the %debug Magic

The easiest way to debug a Jupyter notebook is to use the %debug magic command. Whenever you encounter an error or exception, just open a new notebook cell, type %debug and run the cell. This will open a command line where you can test your code and inspect all variables right up to the line that threw the error.

Type "n" and hit Enter to run the next line of code (The → arrow shows you the current position). Use "c" to continue until the next breakpoint. "q" quits the debugger and code execution.

IPython Debugger

from IPython.core.debugger import set_trace
set_trace()

debugger

debugger is a good JupyterLab extension enabling debugging support.

PixieDebugger of the pixiedust Package

pixiedust is only for Jupyter notebooks. and JupyterLab is not support at this time.

https://github.com/pixiedust/pixiedust/issues/613

References

https://medium.com/@chrieke/jupyter-tips-and-tricks-994fdddb2057

https://medium.com/codait/the-visual-python-debugger-for-jupyter-notebooks-youve-always-wanted-761713babc62