code: def main():
      argv = sys.argv[1:]
      if len(argv) < 5:
          usage()
      else:
          pretty = 0
          input = ""
          output = ""
          encoding = "utf_8"
          language = "English"
          show_help = False
          while len(argv):
              arg = argv.pop(0)
              if arg == "-h":
                  show_help = True
                  break
              elif arg == "-p":
                  pretty = 1
              elif arg == "-p2":
                  pretty = 2
              elif arg == "-l":
                  if len(argv) == 0:
                      show_help = True
                      break
                  language = argv.pop(0)
              elif arg == "-i":
                  if len(argv) == 0:
                      show_help = True
                      break
                  input = argv.pop(0)
              elif arg == "-o":
                  if len(argv) == 0:
                      show_help = True
                      break
                  output = argv.pop(0)
              elif arg == "-c":
                  if len(argv) == 0:
                      show_help = True
                      break
                  encoding = argv.pop(0)
          if show_help or input == "" or output == "":
              usage()
          else:
              stemming(language, input, output, encoding, pretty)
  
imports: import sys
  import codecs
  import snowballstemmer
label_desc: Use image node_id 2 for calling a global function with example usage: main() without return types