[Tutor] pure function problem

[David Hutto]

On Fri, Sep 24, 2010 at 1:43 AM, Roelof Wobben <rwobben at hotmail.com> wrote:
>
>
>
> ----------------------------------------
>> From: steve at pearwood.info
>> To: tutor at python.org
>> Date: Fri, 24 Sep 2010 13:00:40 +1000
>> Subject: Re: [Tutor] pure function problem
>>
>> Roelof, please learn to delete unnecessarily quoted text. There's no
>> need to quoted the entire discussion every time you answer.
>>
>> On Fri, 24 Sep 2010 06:20:25 am Roelof Wobben wrote:
>>
>>> time = tijd()
>> [...]
>>> print time(uitkomst)
>>
>> Why are you calling time as a function, when it is a tijd instance?
>>
>>
>>
>>
>> --
>> Steven D'Aprano
>> _______________________________________________
>> Tutor maillist - Tutor at python.org
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>
>
> Hello Steve,
>
> I found this in my tutorial.
>
> 13.8. Instances as return values¶
> Functions can return instances. For example, find_center takes a Rectangle as an argument and returns a Point that contains the coordinates of the center of the Rectangle:
> def find_center(box):
>    p = Point()
>    p.x = box.corner.x + box.width/2.0
>    p.y = box.corner.y - box.height/2.0
>    return p
> To call this function, pass box as an argument and assign the result to a variable:
>>>> center = find_center(box)
>>>> print_point(center)
> (50.0, 100.0)
>
>
> So i followed it but appearently not the good way.
>
> Roelof
>
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>
If I'm understanding the question correctly(I skim alot)
It looks like you're trying to use a class like a function.

If you had:

class tijd(object):
    def bob:
        pass

then you would call bob from the class in an instance like this:

aclass = tijd()
calledClassFunction = aclass.bob

but if you have

aclass = tijd()
calledClassFunction = aclass.notbob

then you can't access it, because notbob is not in tijd(), therefore
not in aclass, which is still the same as being tijd().bob, you just
have to call the
class instance before the function can be accessed.