So I import the Python debugger module and initiate an instance of it: ```python from IPython.core.debugger import pdb pdb.set_trace() ``` I define a function to test debug mode: ```python def f(a=1): ...

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IPython 5.4-LTS is the first release of IPython after the release of the 6.x series which is Python 3 only. It backports most of the new exposed API additions made in IPython 6.0 and 6.1 and avoid ...