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Author ncoghlan
Recipients ezio.melotti, gcewing, hakril, ncoghlan
Date 2014-07-13.01:19:12
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It's a side effect of the hidden closure that provides the new scope for the iteration variable - that's an ordinary function object, so using yield or yield from turns it into a generator expression instead. Generator expressions are already generators, so using yield or yield from just adds more yield points beyond the implied ones.

I've never figured out a good way to document it - it's a natural consequence of the comprehension's closure. An explicit mention in the reference docs for comprehensions may be worth adding.
Date User Action Args
2014-07-13 01:19:13ncoghlansetrecipients: + ncoghlan, gcewing, ezio.melotti, hakril
2014-07-13 01:19:13ncoghlansetmessageid: <>
2014-07-13 01:19:13ncoghlanlinkissue21964 messages
2014-07-13 01:19:12ncoghlancreate