Re: [Python-Dev] Re: anonymous blocks

[Tim Delaney]

Guido van Rossum wrote:
but for backwards compatibility with the existing argument-less next()
API I'm introducing a new iterator API next_ex() which takes an
exception argument.  If that argument is None, it should behave just
like next().  Otherwise, if the iterator is a generator, this will
Might this be a good time to introduce __next__ (having the same signature 
and semantics as your proposed next_ex) and builtin next(obj, 
exception=None)?

def next(obj, exception=None):
   if hasattr(obj, '__next__'):
       return obj.__next__(exception)
   if exception is not None:
       return obj.next(exception) # Will raise an appropriate exception
   return obj.next()
Tim Delaney 

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