Mark Wilson wrote at 2006-9-26 15:33 +0100:
> ...
>We've been working on a Zope web app which has been built and running on Zope 
>2.7.0 for over 2 years now. Recently I've been trying to move it to Zope 
>2.9.4 but have encountered some severe difficulties with a couple (at least) 
>of monkey patches that are essential to our app and which worked fine with 
>the earlier version.
> ....
>    PF2SpecialUser.PF2Superuser_allowed = SpecialUser.allowed
>                    # replace with our custom method
>    SpecialUser.allowed = PF2SpecialUser.PF2SpecialUser_allowed

Add ".im_func" at the end of these lines.

"im_func" strips the "InstanceMethod" wrapper and gives you
the raw function (which unlike the "InstanceMethod" does not check
the "isinstance" property for the wrong class).

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