code: def byteswap(s):
      """Swaps the endianness of the bytestring s, which must be an array
      of shorts (16-bit signed integers). This is probably less efficient
      than it should be.
      """
      assert len(s) % 2 == 0
      parts = []
      for i in range(0, len(s), 2):
          chunk = s[i : i + 2]
          newchunk = struct.pack("<h", *struct.unpack(">h", chunk))
          parts.append(newchunk)
      return b"".join(parts)
  
imports: import aifc
  import audioop
  import struct
  import sunau
  import wave
  from .exceptions import DecodeError
  from .base import AudioFile
label_desc: Use image node_id 1 for calling a global function with example usage: byteswap(s) and returns: bytes