[correction]an oop question

[Julieta Shem]

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:

> On 2 Nov 2022 09:56:28 GMT, ram at zedat.fu-berlin.de (Stefan Ram) declaimed
> the following:
>
>
>>  Now, in the next program, I have removed the subclassings,
>>  there is no inheritance from the base class "Language"
>>  anymore. Yet the polymorphism in "f" still works. And this
>>  shows that in Python we do *not* need subclassing/inheritance
>>  for polymorphism!
>>
> 	To me, that is not really an example of polymorphism, but more an
> example of Python's "duck typing".
>
> 	I'd implement the example hierarchy as
>
>>>> class Language:
> ... 	def f(self):
> ... 		print(self.greeting)
> ... 		
>>>> class English(Language):
> ... 	def __init__(self):
> ... 		self.greeting = "Good Morning"
> ... 		
>>>> class French(Language):
> ... 	def __init__(self):
> ... 		self.greeting = "Bonjour"
> ... 		
>>>> English().f()
> Good Morning
>>>> French().f()
> Bonjour
>
> 	... with no explicit /function/ for greeting -- it's just an attribute
> set in each subtype, inheriting the "f" function for printing.

A popular encyclopedia would enumerate various specifications of the
word polymorphism.  Ad hoc polymorphism, parametric polymorphim, subtype
polymorphim et cetera.

  ``One of the most difficult matters in all controversy is to
  distinguish disputes about words from disputes about facts: it ought
  not to be difficult, but in practice it is.''
  -- ABC of Relativity, Bertrand Russell, chapter 12, 1925.

  ``What's in a name?'' 
  -- Romeo and Juliet, Shakespeare, 1597.