JupyterLab 3.0 now ships with a Debugger front-end by default.
This means that notebooks, code consoles and files can now be debugged from JupyterLab directly!
For the debugger to be enabled and visible, a kernel with support for debugging is required.
xeus-python is the only Jupyter Kernels for Python that supports debugging.
However other Jupyter Kernels can also support debugging and be compatible with the JupyterLab debugger
by implementing the Jupyter Debugger Protocol.
xeus-python in a new
conda create -n jupyterlab-debugger -c conda-forge jupyterlab=3 xeus-python ptvsd conda activate jupyterlab-debugger
xeus-python can be selected from the JupyterLab launcher:
Alternatively, it is also possible to switch to the xpython kernel using the kernel selection dialog:
Enable the debugger, set breakpoints and step into the code: