code: def test():
      """uuencode/uudecode main program"""
  
      import optparse
  
      parser = optparse.OptionParser(
          usage="usage: %prog [-d] [-t] [input [output]]"
      )
      parser.add_option(
          "-d",
          "--decode",
          dest="decode",
          help="Decode (instead of encode)?",
          default=False,
          action="store_true",
      )
      parser.add_option(
          "-t",
          "--text",
          dest="text",
          help="data is text, encoded format unix-compatible text?",
          default=False,
          action="store_true",
      )
  
      (options, args) = parser.parse_args()
      if len(args) > 2:
          parser.error("incorrect number of arguments")
          sys.exit(1)
  
      # Use the binary streams underlying stdin/stdout
      input = sys.stdin.buffer
      output = sys.stdout.buffer
      if len(args) > 0:
          input = args[0]
      if len(args) > 1:
          output = args[1]
  
      if options.decode:
          if options.text:
              if isinstance(output, str):
                  output = open(output, "wb")
              else:
                  print(sys.argv[0], ": cannot do -t to stdout")
                  sys.exit(1)
          decode(input, output)
      else:
          if options.text:
              if isinstance(input, str):
                  input = open(input, "rb")
              else:
                  print(sys.argv[0], ": cannot do -t from stdin")
                  sys.exit(1)
          encode(input, output)
  
file_path: catboost/contrib/tools/python3/src/Lib/uu.py
imports: import binascii
  import os
  import sys
  import warnings
label_desc: Use image node_id 3 for calling a global function with example usage: test() without return types