[Python] No way to quit IPython debugger's interactive mode in jupyterhub notebook

So I import a module:

from IPython.core.debugger import Pdb


then I initiate an object for debugging:

ipdb = Pdb()


I define a function to test debug mode:

def f(a=1):
ipdb.set_trace()
print(a)


after I run the function:

f()


I am in the debug mode,in this mode I can quit easily with q,however,after I type

interact


to get in the interactive mode(be cause in this mode I can input multiple line code rather than one line code to run more complicated functional codes)

I can't quit this mode unless I kill the whole python jupyter session(like kill the kernel), I have tried quit(),quit,q(),q,exit(),exit and ctrl+C and ctrl+D,None of them works.

I checked the source code of the IPython.core.debugger module and didn't get helpful info.

Anyone knows how to get out of this interactive session?

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