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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 experiments_predictions_get(self, experiment_id, run_id):
 """Get prediction object with given identifier for given experiment. Parameters experiment_id : string Unique experiment identifier run_id : string Unique model run identifier Returns ------- ModelRunHandle Handle for the model run or None if experiment or prediction is unknown """

        # Get experiment to ensure that it exists
        if self.experiments_get(experiment_id) is None:
            return None
        # Get predition handle to ensure that it exists
        model_run = self.predictions.get_object(run_id)
        if model_run is None:
            return None
        # Perform additional check that prediction is for given experiment
        if experiment_id != model_run.experiment_id:
            return None
        # Return model run object
        return model_run