code: def main():
      import sys
      import getopt
  
      try:
          opts, args = getopt.getopt(sys.argv[1:], "td")
      except getopt.error as msg:
          sys.stdout = sys.stderr
          print(msg)
          print("usage: quopri [-t | -d] [file] ...")
          print("-t: quote tabs")
          print("-d: decode; default encode")
          sys.exit(2)
      deco = False
      tabs = False
      for o, a in opts:
          if o == "-t":
              tabs = True
          if o == "-d":
              deco = True
      if tabs and deco:
          sys.stdout = sys.stderr
          print("-t and -d are mutually exclusive")
          sys.exit(2)
      if not args:
          args = ["-"]
      sts = 0
      for file in args:
          if file == "-":
              fp = sys.stdin.buffer
          else:
              try:
                  fp = open(file, "rb")
              except OSError as msg:
                  sys.stderr.write(
                      "%s: can't open (%s)\n" % (file, msg)
                  )
                  sts = 1
                  continue
          try:
              if deco:
                  decode(fp, sys.stdout.buffer)
              else:
                  encode(fp, sys.stdout.buffer, tabs)
          finally:
              if file != "-":
                  fp.close()
      if sts:
          sys.exit(sts)
  
file_path: catboost/contrib/tools/python3/src/Lib/quopri.py
label_desc: Use image node_id 9 for calling a global function with example usage: main() without return types