code: def test_bin16():
      header = b"\xc5"
      data = b"x" * 256
      b = packb(data, use_bin_type=True)
      assert len(b) == len(data) + 3
      assert b[0:1] == header
      assert b[1:3] == b"\x01\x00"
      assert b[3:] == data
      assert unpackb(b) == data
  
      data = b"x" * 65535
      b = packb(data, use_bin_type=True)
      assert len(b) == len(data) + 3
      assert b[0:1] == header
      assert b[1:3] == b"\xff\xff"
      assert b[3:] == data
      assert unpackb(b) == data
  
imports: from pandas.io.msgpack import ExtType, packb, unpackb
label_desc: Use image node_id 3 for calling a global function with example usage: test_bin16() without return types