Vincent van Beveren wrote:
I was working with weak references in Python, and noticed that it
> was impossible to create a weak-reference of bound methods.
> is there anything I can do about it?
You can create your own wrapper that keeps a weak reference to
the underlying object. Here's an example.
import weakref
class weakmethod(object):
def __init__(self, bm):
self.ref = weakref.ref(bm.im_self)
self.func = bm.im_func
def __call__(self, *args, **kwds):
obj = self.ref()
if obj is None:
raise ValueError("Calling dead weak method")
self.func(obj, *args, **kwds)
if __name__ == "__main__":
class A(object):
def foo(self):
print "foo method called on", self
a = A()
m = weakmethod(a.foo)
m()
del a
m()
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