Re: PyDS 0.7.2 upgrade problems

Hello,

At Sun, 16 May 2004 23:02:37 +0200,
Georg Bauer wrote:
> 
> > Tool.py	912	process_request	s = tool.index_html(req)
> > MeshTool.py	855	index_html	toolHasSig[tool] = False
> > NuggetsTool.py	263	__getattr__	else: raise KeyError(name)
> 
> Ah, that's an known thingy. I thought I had stomped them, but there 
> seem to be other places where this specific proble pops up. The reason 
> is a somehow changed behaviour in __getattr__ stuff. With 2.2 you can 
> use an object that has __getattr__ defined in most ways exactly as if 
> it hadn't __getattr__ defined. In 2.3 there seem to be much more 
> situations where some magic method should be called and that breaks, 
> because StandardTool doesn't define that one. Some places where I first 
> found them was with code like
> 
> if tool:
>     # do something
> 
> This didn't work with NuggetsTool and MacrosTool because they didn't 
> have __nonzero__ defined - neither directly nor by means of 
> StandardTool. With 2.2 they had some kind of default behaviour: every 
> instance was nonzero. To fix this for 2.3, I defined __nonzero__ for 
> tools that define __getattr__. So if you give me the detail for the 
> KeyError, I might just plug in the missing method and it should work 
> again.

The key is __hash__ and plugging in 

def __hash__(self):
	return id(self)

them works fine with Python 2.3.

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MATSUI Fe2+ Tetsushi
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