On Wed, 2 Mar 2022 at 09:24, Steven D'Aprano <steve@pearwood.info> wrote:
On Tue, Mar 01, 2022 at 04:04:31PM +0000, Rob Cliffe via Python-ideas wrote:
I have use cases for "do exactly once". Basically a sequence of actions which can be broken off (when something goes wrong and the whole process should be aborted, or when something succeeds and there is no need to try alternatives) at various points with `break`.
class MyBreak(Exception): pass
try: do_this() if condition: raise MyBreak do_that() if condition: raise MyBreak do_next_step() if condition: raise MyBreak do_last_step() except MyBreak: pass
All this is assuming that you can't refactor it into a function and 'return' each time. That's also a viable option, where applicable. ChrisA