code: def main():
      
  
      options, input_file = _parse_options()
  
      if (options.debug):
          run(input_file, options)
      else:
          try:
              run(input_file, options)
          except Exception as e:
              sys.stderr.write("Error: %s\n" % e)
              sys.exit(1)
docs: Main program entry point