how to use private method in a class

[wang frank]

Hi,

I am trying to write a python class with a new data type such as:
class Cc14:
       def __init__(self, realpart, imagpart):
                 self.r=realart
                 self.i=imagpart

       def __saturator(x):
                 return x+1
       def out(self,x):
                 return Cc14(__saturator(x.r), __saturator(x,i))

When I use the method out such as:
z.out

Python complains:

global name '_Cc14_saturator' is not defined.

Is the way put two underscore in front of the definitio making the method 
becomes private?

Why in the same clase, I could not use the __saturator method?

Thanks

Frank



>From: "wang frank" <fw3 at hotmail.co.jp>
>To: python-list at python.org
>Subject: A newbie question
>Date: Mon, 21 May 2007 23:04:06 +0000
>
>Hi,
>
>I am trying to write a python class with a new data type such as:
>class Cc14:
>        def __init__(self, realpart, imagpart):
>                  self.r=realart
>                  self.i=imagpart
>
>        def __add__(self,x):
>                  return self.r+x,r, self.i+x.i
>
>If I have
>x=Cc14(4,5)
>y=Cc14(4,5)
>z=x+y
>
>z will be a tuple instead of Cc14. How can I return a Cc14 class?
>
>Thanks
>Frank
>
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