How to debug Jupyter notebooks in PyCharm ?


I am able to run all the cells in the Jupyter notebook in PyCharm.

I want capability for debugging these Jupyter notebboks.
Like adding breakpoints and checking for variables values when the cell is being executed.



Hi Guruswaroop45! I am sorry for the inconvenience, but unfortunately it's not possible yet, please vote for PY-14742.


Well, have you tried to attach the python process of the notebook into PyCharm? With this approach, you can set PyCharm breakpoints in python scripts imported by the notebook (not on the notebook itself, though). More on this at


That attach thing doesn't work, it just returns after a while and doesn't get to my breakpoint


Hi Peter, I'm sorry it did not work in your case. Indeed the configuration is not trivial.
Yet I've been using this on Linux for months, and on Windows for weeks, thus I think there's a reasonable chance that it should work for you as well.

May I recall the main steps for this?
- start a jupyter notebook server (outside of PyCharm)
- move the function you want to debug to a python script
- configure pycharm to use the same python environment than the kernel used by jupyter. List of kernels is with `jupyter-kernelspec list`, and kernel details, including path to python executable, are in the `kernel.json` file in the kernel directory
- set a breakpoint in the python script, in PyCharm
- import the script in the notebook (re-start and run the notebook to make sure the newly defined function is taken from the script)
- execute %connect_info in Jupyter
- attach PyCharm to the matching kernel
- and finally, call the desired function in the notebook

Please let me know which step exactly doesn't work, I'd be interested in knowing which part is not well documented in my tutorial.




Please try 2019.1 release. New Jupyter support comes with a native debugger out of the box.


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