Bounds checking

[Katie T]

What sort of checks are you making ?  - in general greater than/less than
tend to be fairly optimal, although you might be able to do a faster "is
negative" test

Katie

On Fri, Mar 18, 2011 at 2:24 PM, Martin De Kauwe <mdekauwe at gmail.com> wrote:

> Hi,
>
> if one has a set of values which should never step outside certain
> bounds (for example if the values were negative then they wouldn't be
> physically meaningful) is there a nice way to bounds check? I
> potentially have 10 or so values I would like to check at the end of
> each iteration. However as the loop is over many years I figured I
> probably want to be as optimal as possible with my check. Any
> thoughts?
>
> e.g. this is my solution
>
> # module contain data
> # e.g. print state.something might produce 4.0
> import state as state
>
> def main():
>    for i in xrange(num_days):
>        # do stuff
>
>        # bounds check at end of iteration
>        bounds_check(state)
>
>
> def bounds_check(state):
>    """ check state values are > 0 """
>    for attr in dir(state):
>        if not attr.startswith('__') and getattr(state, attr) < 0.0:
>            print "Error state values < 0: %s" % (attr)
>            sys.exit()
>
> if __name__ == "__main__":
>    sys.exit(main())
>
> thanks
>
> Martin
> --
> http://mail.python.org/mailman/listinfo/python-list
>



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