On 2010-02-18 17:33 PM, Ben Finney wrote:
Robert Kern<robert.k...@gmail.com> writes:
On 2010-02-18 16:25 PM, Stephen Hansen wrote:
The only way I can figure out how to make an empty generator is:
def gen():
# do my one-time processing here
return
yield
Is there a better way? The return/yield just makes me flinch
slightly. I tried just raising StopIteration at the end, but of
course that didn't work.
No need to define functions or classes; let a generator expression take
care of it for you::
>>> foo = (x for x in list())
>>> foo.next()
Traceback (most recent call last):
File "<stdin>", line 1, in<module>
StopIteration
He doesn't want *any* empty generator. He wants an iterator that executes some
given side-effect-producing code then immediately raises the StopIteration.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
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