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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:
 async def send_and_receive(self, message, generate_identifier=True, timeout=5):
 """Send a message and wait for a response."""

        await self._connect_and_encrypt()

        # Some messages will respond with the same identifier as used in the
        # corresponding request. Others will not and one example is the crypto
        # message (for pairing). They will never include an identifer, but it
        # it is in turn only possible to have one of those message outstanding
        # at one time (i.e. it's not possible to mix up the responses). In
        # those cases, a "fake" identifier is used that includes the message
        # type instead.
        if generate_identifier:
            identifier = str(uuid.uuid4())
            message.identifier = identifier
        else:
            identifier = 'type_' + str(message.type)

        self.connection.send(message)
        return await self._receive(identifier, timeout)