OO in Python? ^^

[Mike Meyer]

Magnus Lycka <lycka at carmen.se> writes:
> Huh? I must have expressed my thoughts badly. This is trivial to
> use in Python. You could for instance write a module like this:
>
> ### my_module.py ###
> import copy
>
> def sum(*args):
>      result = copy.copy(args[0])
>      for arg in args[1:]:
>          result += arg
>      return result
>
> ### end my_module.py ###
>
> Then you can do:
>
>  >>> from my_module import sum
>  >>> sum(1,2,3)
> 6
>  >>> sum('a','b','c')
> 'abc'
>  >>> sum([1,2,3],[4,4,4])
> [1, 2, 3, 4, 4, 4]
>  >>>
>
> Assume that you didn't use Python, but rather something with
> static typing. How could you make a module such as my_module.py,
> which is capable of working with any type that supports some
> standard copy functionality and the +-operator?

CLU had this decades ago. You'd right something like:

def sum(*args) args has +=:
    ...

Basically, it did duck typing, checked at compile time instead of
dynamically.

        <mike
-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
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