[Zope3-dev] keeping attributes abstract

[Sidnei da Silva]

On Thu, Mar 09, 2006 at 07:11:20AM -0500, Stephan Richter wrote:
| On Wednesday 08 March 2006 23:52, Sam Stainsby wrote:
| > No 'bar' attribute needed!
| 
| I'll note that in the Python community we consider it an advantage of using 
| attributes/properties versus accessor and mutator methods. This distinction 
| between an attribute- versus method-centric object oriented programming 
| language has been discussed in many articles.
| 
| Note that we provide several other mechanisms to extend functionality; for 
| example, the event system. Overall Zope (like most other Python code) is 
| optimized to work with attributes/properties. We just like them too much! :-)

Not to mention that you can still use accessors/mutators with plain
attributes, and then store the actual value under a different name to
avoid the clash:

class FooX(Persistent):
    implements(IFooB)

    _bar = None

    def setBar(self, bar):
        doSomething()
        self._bar = bar


    def getBar(self):
        doSomethingElse()
        return self._bar

    bar = property(getBar, setBar)

-- 
Sidnei da Silva
Enfold Systems, Inc.
http://enfoldsystems.com