How could I implement a virtual method and override it in python?

[Lawrence D’Oliveiro]

On Thursday, September 15, 2016 at 10:18:09 AM UTC+12, wesley.... at iugome.com wrote:
> Helper.py:
> 
> def Foo( *args ):
> 	print ("This is a callback")
> 
> def Run:
>     Foo()
> 
> 
> MyModule.py:
> 
> import Helper
> 
> def Foo( *args ):
> 	print ("I want to be the new callback")

Overrides and subclassing applies to classes, not modules.