code: def merge_partitions(
      num_blocks: int, get_block: Callable[[int, int], np.ndarray]
  ) -> Iterable[memoryview]:
      blocks = [get_block(i, 0) for i in range(num_blocks)]
      for block in blocks:
          yield block
  
imports: from typing import Callable, Iterable, List
  import numpy
  from ray.experimental.raysort.types import BlockInfo
label_desc: Use image node_id 3 for calling a global function with example usage: merge_partitions(num_blocks, get_block) without return types