Dynamically adding and removing methods

[Ron Adam]

Steven D'Aprano wrote:


> Or you could put the method in the class and have all instances recognise
> it:
> 
> py> C.eggs = new.instancemethod(eggs, None, C)
> py> C().eggs(3)
> eggs * 3

Why not just add it to the class directly?  You just have to be sure 
it's a class and not an instance of a class.


 >>> def beacon(self, x):
...    print "beacon + %s" % x
...
 >>> C.beacon = beacon
 >>> dir(A)
['__doc__', '__module__', 'beacon', 'ham', 'spam']
 >>> A.beacon(3)
beacon + 3
 >>> del beacon
 >>> dir(A)
['__doc__', '__module__', 'beacon', 'ham', 'spam']
 >>> A.beacon(3)
beacon + 3
 >>> dir(C)
['__doc__', '__module__', 'beacon', 'ham', 'spam']


Cheers,
Ron