On 10/26/07, Piyush Jain <[EMAIL PROTECTED]> wrote:
> Hi,
> Itis possible to change the class of an object by assigning new value to
> __class__
> Is it possible to call my module when it is done.
> For example,
> object = ClassA()
>
> object.__class__ = classB # I want to call my method when this statement is
> executed.
Here's an example of how to do this:
class A(object):
def __init__(self):
self._class = A
def getclass(self):
return self._class
def setclass(self, x):
print 'setting __class__ to %s' % x
self._class = x
__class__ = property(getclass, setclass)
class B(object):
pass
if __name__ == '__main__':
a = A()
print 'Running a.__class__ = B'
a.__class__ = B
print 'a.__class__ = %s' % a.__class__
> I want to do it in a general way. For ex. , whenever __class__ is changed
> for any object instance (of different classes), my own function is called.
> How should I do it ?
I think you can do this using a metaclass, and then have all of your
classes inherit from the metaclass rather than object, but I don't
really have any experience doing this.
--
Evan Klitzke <[EMAIL PROTECTED]>
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