code: def compress(data, compresslevel=9):
      """Compress a block of data.
  
      compresslevel, if given, must be a number between 1 and 9.
  
      For incremental compression, use a BZ2Compressor object instead.
      """
      comp = BZ2Compressor(compresslevel)
      return comp.compress(data) + comp.flush()
  
imports: from builtins import open
  import io
  import os
  import _compression
  from _bz2 import BZ2Compressor, BZ2Decompressor
label_desc: Use image node_id 2 for calling a global function with example usage: compress(data, compresslevel) and returns: unknown