On Tuesday, October 20, 2015 at 10:01:44 AM UTC+1, Wolfgang Maier wrote: > On 20.10.2015 10:44, ngangsia akumbo wrote: > >>>> def n(): > > 34 * 2 > > > > > >>>> def g(): > > 4 + 2 > > > > Your n and g functions do not have an explicit return so, after doing > their calculations and throwing the result away, they return None. > > >>>> def ng(): > > return n() + g() > > > >>>> ng() > > > > Traceback (most recent call last): > > File "<pyshell#14>", line 1, in <module> > > ng() > > File "<pyshell#13>", line 2, in ng > > return n() + g() > > TypeError: unsupported operand type(s) for +: 'NoneType' and 'NoneType' > > > > The attempt in ng to add None to None then produce the exception you are > seeing.
thanks -- https://mail.python.org/mailman/listinfo/python-list
