code: def checkArgs(args):
      
      # Check if we have the tped and the tfam files
      required_file_extensions = {".tfam", ".tped"}
      if args.is_bfile:
          required_file_extensions = {".bed", ".bim", ".fam"}
      for fileName in [args.ifile + i for i in required_file_extensions]:
          if not os.path.isfile(fileName):
              msg = "{}: no such file".format(fileName)
              raise ProgramError(msg)
  
      # Check the mind option (between 0 and 1, inclusive)
      if (args.mind < 0) or (args.mind > 1):
          msg = "mind=%f: must be between 0 and 1 (inclusive)" % args.mind
          raise ProgramError(msg)
  
      return True
docs: Checks the arguments and options.
  
      :param args: a object containing the options of the program.
  
      :type args: argparse.Namespace
  
      :returns: ``True`` if everything was OK.
  
      If there is a problem with an option, an exception is raised using the
      :py:class:`ProgramError` class, a message is printed to the
      :class:`sys.stderr` and the program exists with code 1.