code: def _get_opt(config, key, option, opt_type):
      
      for opt_key in [option, option.replace('-', '_')]:
          if not config.has_option(key, opt_key):
              continue
  
          if opt_type == bool:
              return config.getbool(key, opt_key)
  
          if opt_type == int:
              return config.getint(key, opt_key)
  
          if opt_type == str:
              return config.get(key, opt_key)
  
          if opt_type == list:
              return _parse_list_opt(config.get(key, opt_key))
  
          raise ValueError("Unknown option type: %s" % opt_type)
docs: Get an option from a configparser with the given type.