python - jupyter: how to stop execution on errors? -

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the common way defensively abort execution in python like:

if something_went_wrong:     print("error message: goodbye cruel world")     exit(1)

however, not practice when using jupyter notebook, seems abort kernel entirely, not wanted. there proper/better way in jupyter, besides hack-y inifinte loops?

no, exit() not way abort python execution usually. exit() meant stop interpreter status code.

usually write script that:

 if __name__ == '__main__':      sys.exit(main())

try not put sys.exit() in middle of code bad practice, , might end non closed filehandle or locked resources.

to want, raise exception of right type, , if propagate eval loop, ipython stop notebook execution.

plus give useful error messages , stack trace.

if type(age) not int:     raise typeerror("age must integer") elif age < 0:     raise valueerror("sorry can't born in future") else :     ...

you can inspect stack post-mortem %debug , see went wrong where, that's subject.


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