Simple Python accessors (@getter/@Setter and @deleter) example/test using mixin and decorators... I'm using Python 2.6 for testing.

am_script2.py

import pprint
# pprint.pprint(dir(obj))
# pprint.pprint(list)

# $ python manage.py runscript am_script2

class BaseMixin(object):
    
    #----------------------------------
    # Init:
    #----------------------------------
    
    def __init__(self):
        
        # Default value:
        self._x = None
    
    #----------------------------------
    # Accessors:
    #----------------------------------
    
    @property
    def x(self):
        
        "I'm the 'x' property."
        
        # Return the value of x:
        return self._x
    
    @x.setter
    def x(self, value):
        
        # Set the value of x:
        self._x = value
    
    @x.deleter
    def x(self):
        
        # Delete the value of x:
        del self._x

class Foo(BaseMixin):
    
    # What to do here?
    pass

def run():
    
    # Instanciate:
    f = Foo()
    
    # Set:
    f.x = 'Dogs!'
    
    # Interrogate:
    pprint.pprint(dir(f))
    pprint.pprint(dir(f.x))
    
    # Get:
    print f.x
    
    # Delete:
    del(f.x)
    
    #print f.x # AttributeError: 'Foo' object has no attribute '_x'

bash.txt

$ python manage.py runscript am_script2
['__class__',
 '__delattr__',
 '__dict__',
 '__doc__',
 '__format__',
 '__getattribute__',
 '__hash__',
 '__init__',
 '__module__',
 '__new__',
 '__reduce__',
 '__reduce_ex__',
 '__repr__',
 '__setattr__',
 '__sizeof__',
 '__str__',
 '__subclasshook__',
 '__weakref__',
 '_x',
 'x']
['__add__',
 '__class__',
 '__contains__',
 '__delattr__',
 '__doc__',
 '__eq__',
 '__format__',
 '__ge__',
 '__getattribute__',
 '__getitem__',
 '__getnewargs__',
 '__getslice__',
 '__gt__',
 '__hash__',
 '__init__',
 '__le__',
 '__len__',
 '__lt__',
 '__mod__',
 '__mul__',
 '__ne__',
 '__new__',
 '__reduce__',
 '__reduce_ex__',
 '__repr__',
 '__rmod__',
 '__rmul__',
 '__setattr__',
 '__sizeof__',
 '__str__',
 '__subclasshook__',
 '_formatter_field_name_split',
 '_formatter_parser',
 'capitalize',
 'center',
 'count',
 'decode',
 'encode',
 'endswith',
 'expandtabs',
 'find',
 'format',
 'index',
 'isalnum',
 'isalpha',
 'isdigit',
 'islower',
 'isspace',
 'istitle',
 'isupper',
 'join',
 'ljust',
 'lower',
 'lstrip',
 'partition',
 'replace',
 'rfind',
 'rindex',
 'rjust',
 'rpartition',
 'rsplit',
 'rstrip',
 'split',
 'splitlines',
 'startswith',
 'strip',
 'swapcase',
 'title',
 'translate',
 'upper',
 'zfill']
Dogs!

"Discussion" here.