code: def num_simd_lanes_per_word(dtype: str) -> int:
      """Takes a dtype, and returns how many of that dtype fit into a single microcontroller word.
  
      >>> num_simd_lanes_per_word("int8")
      4
      >>> num_simd_lanes_per_word("int16")
      2
      """
      assert dtype.startswith("int")
      dtype_width = int(dtype[3:])
      return MICRO_WORD_LENGTH_BITS // dtype_width
  
label_desc: Use image node_id 1 for calling a global function with example usage: num_simd_lanes_per_word(dtype) and returns: unknown