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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_sampling_strategy(self, sensor_name):
 """Get the current sampling strategy for the named sensor Parameters sensor_name : str Name of the sensor (normal or escaped form) Returns ------- strategy : tuple of str parameters are as defined by the KATCP spec """

        cache_key = self._get_strategy_cache_key(sensor_name)
        cached = self._strategy_cache.get(cache_key)
        if not cached:
            return resource.normalize_strategy_parameters('none')
        else:
            return cached