Scott David Daniels <scott.dani...@acm.org> wrote:
> RajNewbie wrote:
> > On Jan 12, 6:51 pm, Tim Chase <python.l...@tim.thechases.com> wrote:
> [a perfectly fine reply which is how I'd solve it]
> >> RajNewbie wrote:
> >>> ... The solution that I had in mind is:
> >>> while True:
> >>> ...
> >>> if <condition>: break
> >>> if inifinte_loop(): raise infiinte_loop_exception
> >>> Wherein infinite_loop is a generator, which returns true if i > 200
> >>> def infinite_loop():
> >>> i = 0
> >>> while i < 200:
> >>> i++
> >>> yield False
> >>> yield True
> >>> Could somebody let me know whether this is a good option?
> > ...
> > But, I still feel it would be much more aesthetically pleasing if I
> > can call a single procedure like
> > if infinite_loop() -> to do the same.
> > Is it somehow possible? - say by using static variables, iterators --
> > anything?
>
> Yes, it is possible. After:
>
> def Fuse(count, exception):
> for i in range(count):
> yield None
> raise exception
>
> You can do your loop as:
> check_infinite = Fuse(200, ValueError('Infinite Loop')).next
> while True:
> ...
> check_infinite()
Or related to the above and the original proposal
class InfiniteLoopError(Exception):
"""An 'infinite' loop has been detected"""
def infinite_loop(max=200):
for i in xrange(max):
yield i
raise InfiniteLoopError()
Use it like this
for i in infinite_loop():
if i > 10:
break
print "iteration", i
or
for i in infinite_loop(10):
print "iteration", i
> but I agree with Tim that a for ... else loop for the limit is
> clearer.
Probably yes
--
Nick Craig-Wood <n...@craig-wood.com> -- http://www.craig-wood.com/nick
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