Using object proxy as sender do not work

[reidfaiv]

When application uses object proxy as sender in connect then signal is never delivered. This is due use of object id, which is different for real object and proxy.

For example when using https://pypi.python.org/pypi/lazy-object-proxy the signal is never received.

import blinker
from lazy_object_proxy import Proxy

class X(object):
    def receive(self, *args, **kwargs):
      print 'got signal'
    def send(self):
      print 'sending signal'
      test_signal.send(self)

x = X()

def get_x():
    return x

x_proxy = Proxy(get_x)  # Lazy object proxy is useful sometimes

test_signal = blinker.Signal()
test_signal.connect(x_proxy.receive, sender=x_proxy)

x_proxy.send()  # never received because id(x) != id(x_proxy)

Even though x and x_proxy have different id values, the normal equal comparison works, as well as hash() returns same value:

>>> id(x) == id(x_proxy)
False
>>> x == x_proxy
True
>>> hash(x) == hash(x_proxy)
True

It is similar issue as reported in #30 and similar solution (using hash) would help.

[jek]

hash() values are not unique across types (or guaranteed unique amongst instances of types), which is why identity is used now.