how to use property

[Kartic]

neutrinman at myrealbox.com said the following on 2/25/2005 5:25 AM:
> My question is how should I use "property" which wraps up
> __get_channel() and __set_channel()in the following program.
> I tried the program that written below, and it worked. Then I tried:
>     channel = property(__get_channel,__set_channel) as in comment 1, 2,
> and 3,
> 
> but it generates the error:
>     Traceback (most recent call last):
>   File "C:/WINDOWS/desktop/test.py", line 41, in -toplevel-
>     main()
>   File "C:/WINDOWS/desktpo/test.py", line 37, in main
>     tv.change_channel(choice)
>   File "C:/WINDOWS/desktop/test.py", line 27, in change_channel
>     self.channel(choice)
> TypeError: 'int' object is not callable
> 
> I am now studying class, so want to use property.
> This program simulates changing channel number 1 through 10 on TV.
> How should I use property here?
> 
> 	def change_channel(self, choice):
>                 self.__set_channel(choice)
>                 print self.__get_channel()
> 
>                 #comment2: self.channel(choice)


You see comment#2... You say self.channel(choice). self.channel is an
int object that you are trying to call - channel(choice) - and that is
what your exception states when it says 'int object is not callable'.

You probably meant self.channel = choice

Also, there is a problem in your posted version. You have not defined
volume before usage. So I added it to __init__(..,.., volume=120) to
make it work.

Cheers,
-Kartic