`IPython.core.interactiveshell:InteractiveShell._get_exc_info`

Signature

def _get_exc_info ( self , exc_tuple = None )

get exc_info from a given tuple, sys.exc_info() or sys.last_type etc.

Ensures sys.last_type,value,traceback hold the exc_info we found, from whichever source.

raises ValueError if none of these contain any information