[Tutor] decomposing a problem

[Steven D'Aprano]

On Wed, Dec 26, 2018 at 01:06:04AM +0000, Alan Gauld via Tutor wrote:

> In Smalltalk the default return value from
> any method is self. In Python it is None.
> 
> self allows chaining of methods, None does not.


You might be interested in this simple recipe for retrofitting method 
chaining onto any class:

http://code.activestate.com/recipes/578770-method-chaining-or-cascading/


-- 
Steve