> Right again. The simplest rule to remember seems to be "don't use yield or > yield-from inside a with-statement". You can relax it by limiting it to > context managers that manage any kind of shared resource, but that is > probably already too subtle: e.g. yielding inside "with open(file) as f" > seems fine, but yielding inside "with lock" is problematic, since the other > side might try to acquire the same lock, and deadlock. >
This seems like the kind of thing that might warrant a pylint warning. Probably the more general case, requiring people to think about it and suppress the warning with an explanatory comment (or write the code in a different manner) when they are doing something known to be safe. -gps
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