Customizing class attribute access in classic classes

Sun Oct 30 06:02:35 EDT 2011

Thanks for this Steven. I'm however gettings some pretty odd effects,
both on method access and inheritance. I expanded your example a
bit...
class Meta:
 def __init__(self, name, bases, namespace):
 self.__name__ = name
 self.__bases__ = bases
 self.__dict__ = namespace
 def __str__(self):
 return "<Meta instance>"
 __repr__ = __str__
 def __getattr__(self, name):
 return "Customized " + name
 def __call__(self):
 return self
class Base:
 def basemethod(self):
 return "base"
class A(Base):
 __metaclass__ = Meta
 def method(self):
 return "answer"
The effect seems to be to make all methods of A into static methods,
and to ignore its base classes altogether:
>>> a = A()
>>> print a.blah2
Customized blah2
>>> print a.method()
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
TypeError: method() takes exactly 1 argument (0 given)
>>> print a.method(1)
answer
>>> print A.method(1)
answer
>>> print a.basemethod()
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
TypeError: 'str' object is not callable
>>> isinstance(a, Base)
False
Regards,
Geoff Bache