[Python-ideas] The async API of the future: yield-from

[Serhiy Storchaka]

On 14.10.12 22:38, Terry Reedy wrote:
> On 10/14/2012 1:42 PM, Guido van Rossum wrote:
>  > But then the caller would have to sort through the results and check
>  > for exceptions. I want the caller to be able to use try/except as
>  > well.

> OK. Then ...

   def par(*args):
      results = []
      exceptions = False
      for task in args:
         try:
            result = yield from task
            if exceptions:
                results.append(StopIteration(result))
            else:
                results.append(result)
         except Exception as exc:
            results = [StopIteration(result) for result in results]
            results.append(exc)
            exceptions = True
      if not exceptions:
         return results
      else:
         exc = MultiXException()
         exc.results = results
         raise exc