There is a workaround for this in the DocumentTemplate package. It
implements a "safe_callable" function that seems to do the right thing
with ext class instances:
def safe_callable(ob):
# Works with ExtensionClasses and Acquisition.
if hasattr(ob, '__class__'):
if hasattr(ob, '__call__'):
return 1
else:
return type(ob) in ClassTypes
else:
return callable(ob)
On Mon, 2002-11-25 at 13:01, Jeremy Hylton wrote:
> It must be any instance of an ExtensionClass. I think Python
> instances used to be true-for-callable as well, but that must have
> been fixed.
>
> Python 2.1.3 (#5, Aug 15 2002, 10:41:31)
> [GCC 2.95.3 19991030 (prerelease)] on linux2
> Type "copyright", "credits" or "license" for more information.
> >>> from ZODB.PersistentList import *
> >>> callable(PersistentList())
> 1
>
> Jeremy
>
>
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