Python complaints
alex
alex at somewhere.around.here
Wed Nov 24 21:33:39 EST 1999
> suppose you have a piece of code that builds a big data structure out
> of class instances; then every time you make a small change and run it
> again (you have to run it again, because existing instances belong to
> the old versions of the classes) you can be leaking a lot of memory.
Sometimes you don't have to run the whole thing again. E.g.
>>> class A:
... def __init__(self,data):self.data=data
...
>>> t=A(5)
>>> t
<__main__.A instance at 815d370>
>>> class A:
... def __repr__(self):return "This really is the new version"
...
>>> t.__class__=A
>>> t
This really is the new version
>>> t.data
5
>>>
This can be very useful if you want to fiddle with a method in an object
that takes a long time to initialize.
But you're probably right about the memory management.
Alex.
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