[Zope] Override a method of an instance in the ZODB?
apm13 at columbia.edu
Fri May 28 14:15:14 EDT 2004
On Thursday 27 May 2004 02:17 pm, Alec Mitchell wrote:
> On Thursday 27 May 2004 02:00 pm, Passin, Tom wrote:
> > In Python, you can override a method of an instance just by assigning it
> > to another function, like this -
> > class Test1:
> > def f1(self):
> > return "f1() of Test1"
> > def f1():
> > return "f1() of instance"
> > T1 = Test1()
> > T1.f1 = f1
> > Running this within the Python interpreter, try the following -
> > >>> T1.f1()
> > 'f1() of instance'
> > Is this what you had in mind?
After a little more digging it turns out that this (a normal function) will
get stored in the ZODB without errors (as my past experience would indicate).
When I first tested it, I used a lambda function instead of a normal function
definition out of laziness, and the lambda apparently won't pickle into the
ZODB, though a normal function will. So, fortunately, nothing seems to have
changed between Python/Zope versions in this regard. However, that still
leaves the problem that doing this doesn't create a bound method, but a
simple function, which cannot properly override the original method (because
it lacks context). Perhaps I should ask about this on the ZODB list?
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