Immutability

[Steve Holden]

Georg Brandl wrote:
> Nick Maclaren wrote:
> 
>>In article <mailman.7542.1151481315.27775.python-list at python.org>,
>>Robert Kern <robert.kern at gmail.com> writes:
>>|> Nick Maclaren wrote:
>>|> > The way that I read it, Python allows only values (and hence types)
>>|> > to be immutable, and not class members.  The nearest approach to the
>>|> > latter is to use the name hiding conventions.
>>|> > 
>>|> > Is that correct?
>>|> 
>>|> You can also make properties that don't allow writing.
>>|> 
>>|> class Foo(object):
>>|> 
>>|>      def __init__(self, bar):
>>|>          self._bar = bar
>>|> 
>>|>      @property
>>|>      def bar(self):
>>|>          return self._bar
>>
>>Thanks very much.  And, what's more, I have even found its documentation!
>>Whatsnew2.2.  The 2.4.2 reference is, er, unhelpful.
> 
> 
> Is it?
> 
> http://docs.python.org/lib/built-in-funcs.html
> 
> documents "property" quite well.
> 
I can't really agree that "quite good" documentation doesn't refer to 
the use of property as a decorator. It's obvious that a ncessary upgrade 
to the docs didn't happen (and we can all understand why, I am sure).

regards
  Steve
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