Constants and Globals

[Pierre Rouleau]

>>>>>a.version = 0
>>>>
>>Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>>   File "protect.py", line 107, in writeAccess
>>      raise self.AccessError, "Can not rebind attribute"
>>AccessError: Can not rebind attribute
>>
> 
>>>>a.__class__.version = 3
>>>>a.version
>>>
> 3
Thnaks for pointing this out.

> 
> There is no way to make a truly read only variable in python.
> (Which is a good thing)
And why is this a good thing?  If something is not meant to be 
modifiable in a class, why not being able to make it constant?  Python 
has immutable things. so why not have the ability to have constant things?

Pierre