[docs] [issue18841] math.isfinite fails with Decimal sNAN
report at bugs.python.org
Wed Aug 6 14:18:12 CEST 2014
Mark Dickinson added the comment:
Mark: it's not really ready for a patch, since there's no agreement yet on how best to solve this. In fact, I'm tempted to close as "wont fix": the argument is that the math module consists for the most part only of thin wrappers around the platform math library.
The underlying need (as far as I understand it) is to be able to tell whether a given number is a nan or not without having to know in advance whether it's a float, int or Decimal instance. There may be other ways of achieving this goal (like adding an `is_nan` method to `float` and `int`, for example.)
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