code: def start(self):
               
          self.parse_opt()
          self.parse_cfg()
  
          # if -b, -B or -p option is set, only show information, don't
          # start the experiments
          if self.options.browse or self.options.browse_big or self.options.progress:
              self.browse()
              raise SystemExit
          
          # read main configuration file
          paramlist = []
          for exp in self.cfgparser.sections():
              if not self.options.experiments or exp in self.options.experiments:
                  params = self.items_to_params(self.cfgparser.items(exp))
                  params['name'] = exp
                  paramlist.append(params)
                  
          self.do_experiment(paramlist)
docs: starts the experiments as given in the config file.