Op 2005-10-05, Brian Quinlan schreef <[EMAIL PROTECTED]>:
> Paul Rubin wrote:
>> Brian Quinlan <[EMAIL PROTECTED]> writes:
>>
>>>Have those of you who think that the lack of required declarations in
>>>Python is a huge weakness given any thought to the impact that adding
>>>them would have on the rest of the language? I can't imagine how any
>>>language with required declarations could even remotely resemble
>>>Python.
>>
>>
>> Python already has a "global" declaration;
>
> Which is evaluated at runtime, does not require that the actual global
> variable be pre-existing, and does not create the global variable if not
> actually assigned. I think that is pretty different than your proposal
> semantics.
>
>> how does it de-Pythonize the language if there's also a "local"
>> declaration and an option to flag any variable that's not declared as
>> one or the other?
>
> Your making this feature "optional" contradicts the subject of this
> thread i.e. declarations being necessary. But, continuing with your
> declaration thought experiment, how are you planning on actually adding
> optional useful type declarations to Python e.g. could you please
> rewrite this (trivial) snippet using your proposed syntax/semantics?
>
> from xml.dom import *
>
> def do_add(x, y):
> return '%s://%s' % (x, y)
>
> def do_something(node):
> if node.namespace == XML_NAMESPACE:
> return do_add('http://', node.namespace)
> elif node.namespace == ...
> ...
>
IMO your variable are already mostly declared. The x and y in
the do_add is kind of a declarartion for the parameters x and
y.
--
Antoon Pardon
--
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