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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 get_channel(self, subscription_channel, **observer_params):
 """Get or start the requested channel"""

        keys = subscription_channel.get_routing_keys()
        # watch keys are unique sets of keys that we will attempt to extract from inbound items
        self.watch_keys.add(frozenset({k_v[0] for key in keys for k_v in key}))
        self.create_route(subscription_channel, keys)
        subscription_channel._configure(self, self.connect_api, observer_params)
        return subscription_channel