[Zope-dev] Waaagh! Python Script won't allow __setitem__
Hi,
I've got an object which implements __setitem__ in such a way that it's
perfectly safe for use in Python Scripts. Sadly, it seems that Evan's Byte Code
hacks won't let me do this :-(
Whenever I try to do something like: myobject['fish']=1, I get a traceback like
the following:
Traceback (innermost last):
File E:\Zope\237994~1.0\lib\python\Shared\DC\Scripts\Bindings.py, line 324, in
__call__
(Object: ThePythonScript)
File E:\Zope\237994~1.0\lib\python\Shared\DC\Scripts\Bindings.py, line 353, in
_bindAndExec
(Object: ThePythonScript)
File E:\Zope\237994~1.0\lib\python\Products\PythonScripts\PythonScript.py, line
330, in _exec
(Object: ThePythonScript)
(Info: ({'script': PythonScript instance at 016D16F0, 'container': AProduct
instance at 01923AA0, 'traverse_subpath': [], 'context': AnotherProduct
instance at 01888250}, ({a dictionary of arguments},), {}, None))
File Script (Python), line 6, in ThePythonScript
File
E:\Zope\237994~1.0\lib\python\Products\PythonScripts\zbytecodehacks\VSExec.py,
line 429, in __setitem__
TypeError: (see above)
Is there any way I can get around this other than renaming __setitem__ to set,
which screws up the nice python syntax?
cheers,
Chris
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Re: [Zope-dev] Waaagh! Python Script won't allow __setitem__
From: Chris Withers [EMAIL PROTECTED] I've got an object which implements __setitem__ in such a way that it's perfectly safe for use in Python Scripts. Sadly, it seems that Evan's Byte Code hacks won't let me do this :-( The only way that the security code can know that your __setitem__ is safe is to rename (or alias) it to __guarded_setitem__. Ditto for other such methods. If I try and do: if type(x) == type(0): Use the Script builtin "same_type" instead: if same_type(x, 0): # Whatever Cheers, Evan @ digicool 4-am ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Waaagh! Python Script won't allow __setitem__
Evan Simpson wrote: The only way that the security code can know that your __setitem__ is safe is to rename (or alias) it to __guarded_setitem__. Ditto for other such methods. Cool :-) Hmmm... I'm sure __getitem__ works okay though ;-) if type(x) == type(0): Use the Script builtin "same_type" instead: if same_type(x, 0): # Whatever But what's so bad about type()?! cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Waaagh! Python Script won't allow __setitem__
From: Chris Withers [EMAIL PROTECTED] But what's so bad about type()?! When applied to an Extension Class, it gives you access to the actual class, rather than a nice inert type. Cheers, Evan @ digicool 4-am ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Waaagh! Python Script won't allow __setitem__
Evan Simpson wrote: From: Chris Withers [EMAIL PROTECTED] But what's so bad about type()?! When applied to an Extension Class, it gives you access to the actual class, rather than a nice inert type. Hmmm arguably a bug in ExtensionClass, but not one I'm gonna try and fix ;-) Oh well, s'pose it's a good enough reason :-) cheers, Chris ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Waaagh! Python Script won't allow __setitem__
At 05:25 PM 2/19/01 +, Chris Withers wrote: Hmmm arguably a bug in ExtensionClass, but not one I'm gonna try and fix ;-) It's not a bug, it's a feature -- the feature that is the reason for the very existence of ExtensionClasses in the first place: merging of the notion of type and class. Of course, type() could always be replaced with a safe_type function that checked whether the type() was an ExtensionClass and returned something inert. ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
