Chris Withers writes:
 > And I suppose the other part of my wishlist:
 > 
 >  class MyClass(Acquisition.Implicit):
 >      # your_attribute will be acquied
 >  
 >      # index_html won't
 >      index_html = None
No, that is not enough!

As a side effect to turn off acquisition, you defined
the attribute. This will not play well with inheritance:
You will not only prevent acquisition of "index_html" but
also prevent inheritance of it (which may be really necessary
in some contexts).


Dieter

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