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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 send(self, message):
 """Send a single message to the websocket."""

        if isinstance(message, bytes):
            message = message.decode("utf8")

        with self.send_lock:
            try:
                self.ws.send(message)
            except socket.error:
                chat_backend.unsubscribe(self)