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Clarify the meaning of normal and subnormal.

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Raymond Hettinger 2009-03-10 04:40:24 +00:00
parent f345a21d8e
commit eecd1dc6e0
1 changed files with 7 additions and 3 deletions
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10
Doc/library/decimal.rst
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@ -548,8 +548,11 @@ Decimal objects
.. method:: is_normal()
Return :const:`True` if the argument is a *normal* finite number. Return
:const:`False` if the argument is zero, subnormal, infinite or a NaN.
Return :const:`True` if the argument is a *normal* finite non-zero
number with an adjusted exponent greater than or equal to *Emin*.
Return :const:`False` if the argument is zero, subnormal, infinite or a
NaN. Note, the term *normal* is used here in a different sense with
the :meth:`normalize` method which is used to create canonical values.
.. versionadded:: 2.6
@ -577,7 +580,8 @@ Decimal objects
.. method:: is_subnormal()
Return :const:`True` if the argument is subnormal, and :const:`False`
otherwise.
otherwise. A number is subnormal is if it is nonzero, finite, and has an
adjusted exponent less than *Emin*.
.. versionadded:: 2.6