code: def compute_block_shape(index, shape):
      lower = DistArray.compute_block_lower(index, shape)
      upper = DistArray.compute_block_upper(index, shape)
      return [u - l for (l, u) in zip(lower, upper)]
  
imports: import numpy
  import ray
  import ray.experimental.array.remote
label_desc: Use image node_id 4 for calling the DistArray obj's underlying member method code with example usage: obj.compute_block_shape(index, shape) and returns: unknown