Paul Novak 写道:
> A lot of the complexity of design patterns in Java falls away in
> Python, mainly because of the flexibility you get with dynamic typing.
>
I agree with this very much !
In java or C++ or all such static typing and compiled languages , the
type is fixed on
in the compile phrase , so for the flexible at the runtime , we often
need to program to
interface . For example ,
we do in java :
implement I{...}
class A implement I{...}
class B implement I{...}
oprate(I var) // we can pass A's instance or B's instance here
and in C++ :
class Abstract{...}
class A : Abstract{...}
class B : Abstract{...}
oprate(Abstract var) // pass the A's instance or B's instance here
But in python , type is dynamic , and name is bind at runtime , so we
can pass any variable as we want ! This feather make python not need for
redundant class inherits
and interfaces which are the core of the GoF's design patterns I think !
> For a Pythonic Perspective on Patterns, "Python Programming Patterns"
> by Thomas W. Christopher is definitely worth tracking down. It looks
> like it is out of print, but you can find used copies on Amazon.
>
> Regards,
>
> Paul.
>
>
> This sounds like an article crying out to be written,
> "(Learning) Design Patterns with Python".
>
> Has it been written already?
>
> Cheers,
> Terry
>
>
> Bruce Eckel began writing "Thinking In Python" it was last updated
> in 2001.
>
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