Dynamically adding methods to a class...

[Piyush Anonymous]

class MyObject:
   def __init__(self, name):
     self.name = name

   def do_this_default(self):
      print "default do_this implementation for %s" % self.name

def custom_do_this(): #method to be added
   print "custom do_this implementation for %s" % self.name


def funcToMethod(func,clas,method_name=None):
    """Adds func to class so it is an accessible method; use method_name to
specify the name to be used for calling the method.
    The new method is accessible to any instance immediately."""
    import new
    method = new.instancemethod(func,None,clas)
    print method
    if not method_name: method_name=func.__name__
    clas.__dict__[method_name]=func


myobj = MyObject('myobj1')
funcToMethod(custom_do_this,MyObject) #trying 2 add method to class not
instance
print myobj.custom_do_this()

---
Error I am getting;
TypeError: custom_do_this() takes no arguments (1 given)

Why am I getting it?

Also how can I do this in new style class (inherited from 'object')?
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