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Merged revisions 83732 via svnmerge from 

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  r83732 | mark.dickinson | 2010-08-04 19:42:43 +0100 (Wed, 04 Aug 2010) | 3 lines

  Issue #9498:  Add reference to sys.float_info from 'numeric types' docs.
  Thanks Yitz Gale.
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Mark Dickinson 2010-08-04 18:43:36 +00:00
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Doc/library/stdtypes.rst
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@ -216,14 +216,15 @@ Numeric Types --- :class:`int`, :class:`float`, :class:`complex`
There are three distinct numeric types: :dfn:`integers`, :dfn:`floating
point numbers`, and :dfn:`complex numbers`. In addition, Booleans are a
subtype of integers. Integers have unlimited precision. Floating point
numbers are implemented using :ctype:`double` in C---all bets on their
precision are off unless you happen to know the machine you are working
with. Complex numbers have a real and imaginary part, which are each
implemented using :ctype:`double` in C. To extract these parts from a
complex number *z*, use ``z.real`` and ``z.imag``. (The standard library
includes additional numeric types, :mod:`fractions` that hold rationals,
and :mod:`decimal` that hold floating-point numbers with user-definable
precision.)
numbers are usually implemented using :ctype:`double` in C; information
about the precision and internal representation of floating point
numbers for the machine on which your program is running is available
in :data:`sys.float_info`. Complex numbers have a real and imaginary
part, which are each a floating point number. To extract these parts
from a complex number *z*, use ``z.real`` and ``z.imag``. (The standard
library includes additional numeric types, :mod:`fractions` that hold
rationals, and :mod:`decimal` that hold floating-point numbers with
user-definable precision.)
.. index::
pair: numeric; literals