code: def perform_command(self):
          
          if len(self.actual_arguments) < 1:
              return self.print_help()
          audio_file_path = self.actual_arguments[0]
  
          try:
              audiofile = AudioFile(audio_file_path, rconf=self.rconf, logger=self.logger)
              audiofile.read_properties()
              if self.has_option([u"-f", u"--full"]):
                  audiofile.read_samples_from_file()
              self.print_generic(audiofile.__unicode__())
              return self.NO_ERROR_EXIT_CODE
          except OSError:
              self.print_error(u"Cannot read file '%s'" % (audio_file_path))
              self.print_error(u"Make sure the input file path is written/escaped correctly")
          except AudioFileProbeError:
              self.print_error(u"Unable to call the ffprobe executable '%s'" % (self.rconf[RuntimeConfiguration.FFPROBE_PATH]))
              self.print_error(u"Make sure the path to ffprobe is correct")
          except AudioFileUnsupportedFormatError:
              self.print_error(u"Cannot read properties of file '%s'" % (audio_file_path))
              self.print_error(u"Make sure the input file has a format supported by ffprobe")
  
          return self.ERROR_EXIT_CODE
docs: Perform command and return the appropriate exit code.
  
          :rtype: int