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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def connectionLost(self, reason):
 """ Called by the DBus Connection object when the connection is lost. @type reason: L{twistd.python.failure.Failure} @param reason: The value passed to the associated connection's connectionLost method. """

        for wref in self._weakProxies.valuerefs():
            p = wref()
            if p is not None:
                p.connectionLost(reason)