code: def encode_schedule(schedule):
    
    interpolation, steps, pmfs = schedule
    return interpolation + ' ' + ' '.join(
        '@' + str(s) + ' ' + ' '.join(map(str, p)) for s, p in zip(steps, pmfs))
docs: Encodes a schedule tuple into a string.
  
    Args:
      schedule: A tuple containing (interpolation, steps, pmfs), where
        interpolation is a string specifying the interpolation strategy, steps
        is an int array_like of shape [N] specifying the global steps, and pmfs is
        an array_like of shape [N, M] where pmf[i] is the sampling distribution
        at global step steps[i]. N is the number of schedule requirements to
        interpolate and M is the size of the probability space.
  
    Returns:
      The string encoding of the schedule tuple.