On Fri, Feb 11, 2005 at 01:17:55PM -0700, Steven Bethard wrote: > George Sakkis wrote: > >"Steven Bethard" <[EMAIL PROTECTED]> wrote in message > >news:[EMAIL PROTECTED] > > > >>Is there a good way to determine if an object is a numeric type? > > > >In your example, what does your application consider to be numeric? > > Well, here's the basic code: > > def f(max=None): > ... > while max is None or n <= max: > ... > # complicated incrementing of n > > So for 'max', technically all I need is <= support. However, the code > also depends on the fact that after incrementing 'n' enough, it will > eventually exceed 'max'. Currently, ints, longs, floats, and Decimals > will all meet this behavior. But I'd rather not specify only those 4 > (e.g. with a typecheck), since someone could relatively easily create > their own new numeric type with the same behavior. Do you know a better > way to test for this kind of behavior?
Why don't you express just this need as an assertion?
assert 0 <= max <= max + 1, 'Argument must not be zany'
(or whatever error message is suitable)
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John Lenton ([EMAIL PROTECTED]) -- Random fortune:
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