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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 transform(self, trajs_tuple, y=None):
 """Featurize a several trajectories. Parameters traj_list : list(mdtraj.Trajectory) Trajectories to be featurized. Returns ------- features : list(np.ndarray), length = len(traj_list) The featurized trajectories. features[i] is the featurized version of traj_list[i] and has shape (n_samples_i, n_features) """

        return [self.partial_transform(traj_zip)
                for traj_zip in zip(*trajs_tuple)]