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10035871
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0
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2012-04-05T20:54:54.203
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2012-04-05T20:54:54.203
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10034455
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To answer your question: No, there is no way to check the flags using normal floats. You can use the Decimal class, however, which provides much more control . . . but is a bit slower. Your other option is to use an <code>EmptyData</code> or <code>Null</code> class, such as this one: <pre><code>class NullType(object): "Null object -- any interaction returns Null" def _null(self, *args, **kwargs): return self __eq__ = __ne__ = __ge__ = __gt__ = __le__ = __lt__ = _null __add__ = __iadd__ = __radd__ = _null __sub__ = __isub__ = __rsub__ = _null __mul__ = __imul__ = __rmul__ = _null __div__ = __idiv__ = __rdiv__ = _null __mod__ = __imod__ = __rmod__ = _null __pow__ = __ipow__ = __rpow__ = _null __and__ = __iand__ = __rand__ = _null __xor__ = __ixor__ = __rxor__ = _null __or__ = __ior__ = __ror__ = _null __divmod__ = __rdivmod__ = _null __truediv__ = __itruediv__ = __rtruediv__ = _null __floordiv__ = __ifloordiv__ = __rfloordiv__ = _null __lshift__ = __ilshift__ = __rlshift__ = _null __rshift__ = __irshift__ = __rrshift__ = _null __neg__ = __pos__ = __abs__ = __invert__ = _null __call__ = __getattr__ = _null def __divmod__(self, other): return self, self __rdivmod__ = __divmod__ if sys.version_info[:2] >= (2, 6): __hash__ = None else: def __hash__(yo): raise TypeError("unhashable type: 'Null'") def __new__(cls): return cls.null def __nonzero__(yo): return False def __repr__(yo): return '<null>' def __setattr__(yo, name, value): return None def __setitem___(yo, index, value): return None def __str__(yo): return '' NullType.null = object.__new__(NullType) Null = NullType() </code></pre> You may want to change the <code>__repr__</code> and <code>__str__</code> methods. Also, be aware that <code>Null</code> cannot be used as a dictionary key, nor stored in a set.
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1. POPropagation of NaN through calculations
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1. USEthan Furman
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