studying python

Funny, I can have an instance of class X, then add a method to that class, and the instance has the method. That's kind of great. But as well I can assign a method to that specific instance:

x = X('this is "x"')

X.g = lambda parameter: sys.stdout.write('X.g() called with parameter %s' % parameter)

x.g() will call X.g() and pass itself as a parameter.

Now

x.g = lambda parameter: sys.stdout.write('x.g() called with parameter %s' % parameter)

x.g() won't work; have to write x.g(x) to pass the instance.

Any logic here?