Gabriel Genellina added the comment:
I think this methodref function is simpler and much less intrusive
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nosy: +gagenellina
Added file: http://bugs.python.org/file8744/methodref.py
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Tracker <[EMAIL PROTECTED]>
<http://bugs.python.org/issue1417>
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import weakref
import new
class methodref(weakref.ref):
def __new__(cls, method, callback=None):
if not isinstance(method, new.instancemethod):
raise TypeError, 'instancemethod expected; got %s instead' % type(method)
wr = super(methodref, cls).__new__(cls, method.im_self, callback)
wr.im_func = method.im_func
wr.im_class = method.im_class
return wr
def __call__(self):
im_self = super(methodref, self).__call__()
if im_self is not None:
return new.instancemethod(self.im_func, im_self, self.im_class)
class cls1:
def giveTo(self, to):
to.take(self.bla)
def bla(self, arg):
print self, "says", arg
class cls2:
def take(self, what):
self.ref = methodref(what)
c1 = cls1()
c2 = cls2()
print weakref.getweakrefs(c1)
c1.giveTo(c2)
print weakref.getweakrefs(c1)
print c1.bla
print c2.ref
c1.bla("hi")
c2.ref()("hello")
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