[Python-Dev] PEP 550 v4 (original) (raw)
Ethan Furman ethan at stoneleaf.us
Thu Sep 7 08:50:44 EDT 2017
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On 09/07/2017 04:39 AM, Greg Ewing wrote:
1) Under "Generators" it says:
once set in the generator, the context variable is guaranteed not to change between iterations; This suggests that you're not allowed to set() a given context variable more than once in a given generator, but some of the examples seem to contradict that. So I'm not sure what this is trying to say.
I believe I can answer this part: the guarantee is that
the context variable will not be changed while the yield is in effect -- or, said another way, while the generator is suspended;
the context variable will not be changed by subgenerators
the context variable /may/ be changed by normal functions/class methods (since calling them would be part of the iteration)
--
Ethan
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