On Wed, 4 Dec 2019 at 21:16, Anders Hovmöller <[email protected]> wrote:
> > On 4 Dec 2019, at 21:28, Soni L. <[email protected]> wrote:
> >> On 2019-12-04 5:12 p.m., Mike Miller wrote:
> >>
> >>> On 2019-12-04 11:05, David Mertz wrote:
> >>> I've often wanted named loops. I know approaches to this have been
> >>> proposed many times, and they all have their own warts. E.g. an ad hoc
> >>> pseudo code that may or may not match any previous proposal:
> >>>
> >>> for x in stuff as outer:
> >>> for y in other_stuff as inner:
> >>> ...
> >>> if cond:
> >>> break outer
> >>>
> >>> But we all manage without it.
> >>
> >> +1 Nice, find myself with that problem about once a year and it is
> >> annoying to code around.
> >
> > Just use context managers!
>
> What? How exactly? Can you rewrite the example given?
I guess what is meant is this:
from contextlib import suppress
class Exit(BaseException):
pass
stuff = [10, 20, 30]
other_stuff = [1, 2, 3]
with suppress(Exit):
for x in stuff:
for y in other_stuff:
print(x, y)
if x + y > 21:
raise Exit
You can so the same with try/except:
class Exit(BaseException):
pass
stuff = [10, 20, 30]
other_stuff = [1, 2, 3]
try:
for x in stuff:
for y in other_stuff:
print(x, y)
if x + y > 21:
raise Exit
except Exit:
pass
I dislike both of the above though. My suggestion would be to use a
function rather than exceptions:
stuff = [10, 20, 30]
other_stuff = [1, 2, 3]
def func():
for x in stuff:
for y in other_stuff:
print(x, y)
if x + y > 21:
return
func()
In this example it might seem awkward to introduce a function just for
this but normally in context the function can have a more reasonable
purpose and a good name and return something useful etc.
--
Oscar
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