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unsupported operand type(s) python v2.7

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  unsupported operand type(s) python v2.7 ngangsia akumbo <ngangsia@gmail.com> - 2015-10-20 01:44 -0700
    Re: unsupported operand type(s) python v2.7 Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de> - 2015-10-20 11:00 +0200
      Re: unsupported operand type(s) python v2.7 ngangsia akumbo <ngangsia@gmail.com> - 2015-10-20 02:08 -0700
        Re: unsupported operand type(s) python v2.7 ngangsia akumbo <ngangsia@gmail.com> - 2015-10-20 02:13 -0700

#97829 — unsupported operand type(s) python v2.7

>>> def n():
	34 * 2

	
>>> def g():
	4 + 2

>>> 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'

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#97830

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.

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#97831

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

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#97832

On Tuesday, October 20, 2015 at 10:08:51 AM UTC+1, ngangsia akumbo wrote:
> 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


def n():
    return 3 * 2

def g():
    return 3+ 6

def ng():
    return n()+g()

print ng()

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