[Tutor] Calling method in parent class

[The Green Tea Leaf]

OK, bad example. But assume I have the same method in both classes and
want to call the method in the parent.

On Tue, May 12, 2009 at 10:26, Jeremiah Dodds <jeremiah.dodds at gmail.com> wrote:
>
>
> On Tue, May 12, 2009 at 9:05 AM, The Green Tea Leaf
> <thegreentealeaf at gmail.com> wrote:
>>
>> Hi,
>> I've started to learn Python and I'm a bit confused over how to call a
>> method in a parent class. Assume I have:
>>
>> class Parent(object):
>>    def somemethod( self, bla ):
>>        print 'Parent',bla
>>
>> I then create a child class that want to call somemethod. As I
>> understand it I can either do it like this
>>
>> class Child(Parent):
>>    def somemethod( self, bla ):
>>        Parent.somemethod(self,bla)
>>
>> or like this
>>
>> class Child(Parent):
>>    def somemethod( self, bla ):
>>        super(Child,self).somemethod(bla)
>>
>> The first version seem to have the obvious disadvantage that I need to
>> know the name of the parent class when I write the call, so I thought
>> that the second version was the "proper" way of doing it. But when
>> doing some research on the web it seem like the second version also
>> have some problems.
>>
>> My question is simple: what is the "best" way of doing this and why?
>> Or should I mix both these approaches?
>>
>> --
>
> Assuming you don't have the same method in Child, just use self.somemethod:
>
>
> In [2]: class Parent(object):
>    ...:     def foo(self):
>    ...:         print "in parent foo"
>    ...:
>
> In [3]: class Child(Parent):
>    ...:     pass
>    ...:
>
> In [4]: x = Child()
>
> In [5]: x.foo
> Out[5]: <bound method Child.foo of <__main__.Child object at 0x999252c>>
>
> In [6]: x.foo()
> in parent foo
>
> In [7]: class Child(Parent):
>    ...:     def bar(self):
>    ...:         self.foo()
>    ...:         print "in child bar"
>    ...:
>
> In [8]: x = Child()
>
> In [9]: x.bar()
> in parent foo
> in child bar
>
>
>
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>
>



-- 
The Green Tea Leaf   thegreentealeaf at gmail.com   thegreentealeaf.blogspot.com