Reinhold Birkenfeld wrote: > Kay Schluehr wrote: > > Reinhold Birkenfeld wrote: > > > >> > x = [ yield r for r in iterable ] > >> > >> Which is quite different from > >> > >> x = (yield) in iterable > >> > >> which is currently (PEP 342) equivalent to > >> > >> _ = (yield) > >> x = _ in iterable > >> > >> So, no further tinkering with yield, I'm afraid. > >> > >> Reinhold > > > > Is the statement > > > > yield from iterable > > > > also in danger to be ambigous? > > > > The resolution of "(yield) from iterable" into > > > > _ = (yield) > > x = _ from iterable > > > > would not result in valid Python syntax. > > Right. > > Problem is, how would you define the "from" syntax: Is its use as > an expression allowed? What value does it have, then? > > Reinhold
Do you mention statements like this? x = (yield from [1,2,3]) I do think that such "yield-comprehensions" may be valid and raise a StopIteration exception after being called three times by means of next() or send(). Kay -- http://mail.python.org/mailman/listinfo/python-list
