Re: [Zope] Sub Class Question
On Sun, 27 Aug 2000, Loren Stafford wrote: > Here's what MJ told me about that case. I'm not sure it applies to your > case. Did you try it? Did it work? Thanks for the info. It was the Extension class piece I was missing. I tested it on a regular class, of course . The original problem wasn't mine. I think his problem was different (passing **kw on to a class method), and I think I pointed him to the right answer but haven't seen a followup post. --RDM ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Sub Class Question
From: "R. David Murray" <[EMAIL PROTECTED]> > On Sat, 26 Aug 2000, Loren Stafford wrote: > > def index_object(self): > > if self.nextEventTime() is not None: > > CatalogAware.index_object.im_func(self) > > # see Python Reference Manual "The standard type hierarchy" > > # for the built-in type im_func > > I realize this is a Python and a not a Zope question, but > what is the difference between > > CatalogAware.index_object.im_func(self) > > and > > CatalogAware.index_object(self) > > ? > > --RDM > Here's what MJ told me about that case. I'm not sure it applies to your case. Did you try it? Did it work? -- Loren - Original Message - From: "Martijn Pieters" <[EMAIL PROTECTED]> To: "Loren Stafford" <[EMAIL PROTECTED]>; "zope-dev" <[EMAIL PROTECTED]> Sent: March 01, 2000 11:57 AM Subject: [Zope-dev] Re: What is im_func? > From: "Loren Stafford" <[EMAIL PROTECTED]> > > Could you elaborate on what im_func is and what it's role is here. > > > > # Only index if nextEventTime returns something > > def index_object(self): > > if self.nextEventTime() is not None: > > CatalogAware.index_object.im_func(self) > > im_func is a part of Python introspection. It is the pure function > definition of a class, not bound to that class, so I can pass in an > alternate self. > > I am trying to call a superclass method here, and normally > CatalogAware.index_object() would suffice. But because of Extension Classes, > Python gets confused as to what is a class method, and what is a regular > function. It will accuse me of calling an unbound method, which of course I > am not. I circumvent this by calling the unbound function, and passing in > self explicitly. > > Martijn Pieters > ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Sub Class Question
On Sat, 26 Aug 2000, Loren Stafford wrote: > def index_object(self): > if self.nextEventTime() is not None: > CatalogAware.index_object.im_func(self) > # see Python Reference Manual "The standard type hierarchy" > # for the built-in type im_func I realize this is a Python and a not a Zope question, but what is the difference between CatalogAware.index_object.im_func(self) and CatalogAware.index_object(self) ? --RDM ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Sub Class Question
I'm not sure if this is the same situation I encountered in Xron's
XronDTMLMethod.py, where I'm overriding CatalogAware's index_object method.
# Only index if nextEventTime returns something
def index_object(self):
if self.nextEventTime() is not None:
CatalogAware.index_object.im_func(self)
# see Python Reference Manual "The standard type hierarchy"
# for the built-in type im_func
-- HTH
-- Loren
- Original Message -
From: "Daniel Rusch" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: August 25, 2000 02:51 PM
Subject: [Zope] Sub Class Question
> I've created a BasicMethod which is derived from the DTMLMethod.
> everything works great until I try to have the sub class's
> (BasicMethod) __call__ method call the super class's (DTMLMethod)
> __call__ method.
>
> class BasicMethod(DTMLMethod):
> """BasicMethod objects are DocumentTemplate.HTML objects that act
>as methods whose 'self' is the BasicMethod itself."""
>
> meta_type='Basic Method'
>
>
> def __call__(self, client=None, REQUEST={}, RESPONSE=None, **kw):
> print 'Sub Class __call__'
> DTMLMethod.__call__(self, client, REQUEST, RESPONSE, kw)
>
> Globals.default__class_init__(BasicMethod)
>
>
> when I view the BasicMethod in Zope, I get:
> Error Type: TypeError
> Error Value: too many arguments; expected 4, got 5
>
>
> I believe that I need the self arg, if I remove it I get an unbound
> python method error.
>
> Any thoughts???
>
> DR
>
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>
>
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Re: [Zope] Sub Class Question
On Fri, 25 Aug 2000, Daniel Rusch wrote:
> def __call__(self, client=None, REQUEST={}, RESPONSE=None, **kw):
> print 'Sub Class __call__'
> DTMLMethod.__call__(self, client, REQUEST, RESPONSE, kw)
[...]
> when I view the BasicMethod in Zope, I get:
> Error Type: TypeError
> Error Value: too many arguments; expected 4, got 5
>
> I believe that I need the self arg, if I remove it I get an unbound
> python method error.
>
> Any thoughts???
DTMLMethod's __call__ only takes three arguments: client, REQUEST,
and RESPONSE. **kw turns any additional keyword arguments (x=y)
into a dictionary kw. To pass the ones your __call__ receives on
to DTMLMethod's __call__, you have to turn them back into a keyword
list somehow. A quick check of the python language reference
doesn't reveal any special syntactic sugar for doing this. However,
in the definition of __call__ in DTMLMethod I found this:
r = apply(HTML.__call__, (self, client, REQUEST), kw)
Reading about apply in the python docs, it's obviously designed to
do just the job you need .
--RDM
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[Zope] Sub Class Question
I've created a BasicMethod which is derived from the DTMLMethod.
everything works great until I try to have the sub class's
(BasicMethod) __call__ method call the super class's (DTMLMethod)
__call__ method.
class BasicMethod(DTMLMethod):
"""BasicMethod objects are DocumentTemplate.HTML objects that act
as methods whose 'self' is the BasicMethod itself."""
meta_type='Basic Method'
def __call__(self, client=None, REQUEST={}, RESPONSE=None, **kw):
print 'Sub Class __call__'
DTMLMethod.__call__(self, client, REQUEST, RESPONSE, kw)
Globals.default__class_init__(BasicMethod)
when I view the BasicMethod in Zope, I get:
Error Type: TypeError
Error Value: too many arguments; expected 4, got 5
I believe that I need the self arg, if I remove it I get an unbound
python method error.
Any thoughts???
DR
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