text: import re
  import sys
  import argparse
  import os
  
  from ETCetera.exceptions.sentient_base_exception import SentientBaseException
  
  
  
  
  if __name__ == "__main__":
      # main(sys.argv)
      parser = argparse.ArgumentParser(prog='etc2pta', usage='python %(prog)s system_type input_file [options]')
  
      parser.add_argument('system_type', help='System type. Possible values: linear, nonlinear')
      parser.add_argument('input_file', help='Path to input file')
      parser.add_argument('-o', '--output_file', help='Output file, default is out.json if nothing specified. Tries to extract file type from the name if possible.', nargs='?', const='out.json')
      parser.add_argument('--output_type', nargs=1, help='Output file type. Will overwrite type generated from -o option')
      parser.add_argument('-v', '--verbose', help='Increase verbosity', action='count', default=0)
  
      args = parser.parse_args()
      # print(args)
      system_type = args.system_type.lower()
      input_file = args.input_file
  
      if system_type not in {'linear', 'non-linear', 'nonlinear', 'general'}:
          print(f'{system_type} is not a valid system type.')
          parser.print_help()
          sys.exit(os.EX_IOERR)
  
      if not os.path.exists(input_file):
          print(f'{input_file} is not a valid file.')
          parser.print_help()
          sys.exit(os.EX_IOERR)
  
      # if args.verbose:
      import logging
      lv = max(0, 40-10*args.verbose)
      logger = logging.getLogger()
      logger.setLevel(lv)
      ch = logging.StreamHandler()
      ch.setLevel(lv)
      ch.setFormatter(
          logging.Formatter('[%(levelname)s - %(filename)s:%(lineno)s - '
                            '%(funcName)s()] %(message)s'))
      if len(logger.handlers) <= 0:
          logger.addHandler(ch)
  
      # Process output file before the costly computation
      if args.output_file:
          re_string = '\.(json|pickle)$'
          temp = re.findall(re_string, args.output_file)
          if len(temp) > 1 or len(temp) == 0 and not args.output_type:
              print('Please specify a correct output file type.')
  
          out_type = temp[0]
  
          if args.output_type:
              # Replace the extension type
              args.output_file = args.output_file[0:-len(temp[0])] + args.output_type[0]
              out_type = args.output_type[0]
  
      try:
          if system_type == 'linear':
              from ETCetera.util.construct_from_file_linearPETC import \
                  construct_linearPETC_traffic_from_file
              traffic = construct_linearPETC_traffic_from_file(input_file)
  
          if system_type in ['general', 'nonlinear', 'non-linear']:
              from ETCetera.util.construct_from_file_nonlinearETC import \
                  construct_nonlinearETC_traffic_from_file
              traffic = construct_nonlinearETC_traffic_from_file(input_file)
              traffic.visualize()
          # More to follow...
  
      except SentientBaseException as e:
          print(str(e))
          sys.exit()
      else:
          if args.output_file:
              from config import save_path
              if not args.output_file.startswith(save_path):
                  args.output_file = os.path.join(save_path, args.output_file)
  
              traffic.export(args.output_file, out_type)
  
  