diff options
| -rw-r--r-- | Doc/whatsnew/whatsnew25.tex | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/Doc/whatsnew/whatsnew25.tex b/Doc/whatsnew/whatsnew25.tex index aa066d7..99618e6 100644 --- a/Doc/whatsnew/whatsnew25.tex +++ b/Doc/whatsnew/whatsnew25.tex @@ -556,13 +556,14 @@ generators: where the generator's execution is paused. \item \method{close()} raises a new \exception{GeneratorExit} - exception inside the generator to terminate the iteration. - On receiving this - exception, the generator's code must either raise - \exception{GeneratorExit} or \exception{StopIteration}; catching the - exception and doing anything else is illegal and will trigger - a \exception{RuntimeError}. \method{close()} will also be called by - Python's garbage collector when the generator is garbage-collected. + exception inside the generator to terminate the iteration. On + receiving this exception, the generator's code must either raise + \exception{GeneratorExit} or \exception{StopIteration}. Catching + the \exception{GeneratorExit} exception and returning a value is + illegal and will trigger a \exception{RuntimeError}; if the function + raises some other exception, that exception is propagated to the + caller. \method{close()} will also be called by Python's garbage + collector when the generator is garbage-collected. If you need to run cleanup code when a \exception{GeneratorExit} occurs, I suggest using a \code{try: ... finally:} suite instead of |