unsupported operand type(s) python v2.7

[ngangsia akumbo]

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