code: def create_strategy(name=None):
      
      import logging
      from bonobo.execution.strategies.base import Strategy
  
      if isinstance(name, Strategy):
          return name
  
      if name is None:
          name = DEFAULT_STRATEGY
  
      logging.debug("Creating execution strategy {!r}...".format(name))
  
      try:
          factory = STRATEGIES[name]
      except KeyError as exc:
          raise RuntimeError(
              "Invalid strategy {}. Available choices: {}.".format(repr(name), ", ".join(sorted(STRATEGIES.keys())))
          ) from exc
  
      return factory()
docs: Create a strategy, or just returns it if it's already one.
  
      :param name: 
      :return: Strategy