Sean DiZazzo wrote: > Python 2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 12:39:47) > [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin > Type "help", "copyright", "credits" or "license" for more information. >>>> import traceback >>>> tb = traceback.format_exc() >>>> type(tb) > <type 'str'> >>>> tb > 'None\n' >>>> > > > Shouldn't it just return None itself?
No. The function expects that there is a current exception. That's not the case here, and thus it should complain in the usual way -- by raising an exception. However, this function has been around for a while which rules out such a disruptive change. > Why a string with a newline? > > Interested if there is an actual reason for this behavior An implementation accident, if I were to guess. > or if it should > be reported as a bug. Certainly not. -- https://mail.python.org/mailman/listinfo/python-list
