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precision. This has been discussed at http://bugs.python.org/issue1682. It's useful primarily for teaching, but it also demonstrates how to implement a member of the numeric tower, including fallbacks for mixed-mode arithmetic. I expect to write a couple more patches in this area: * Rational.from_decimal() * Rational.trim/approximate() (maybe with different names) * Maybe remove the parentheses from Rational.__str__() * Maybe rename one of the Rational classes * Maybe make Rational('3/2') work.
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750 B
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28 lines
750 B
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.. _numeric:
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********************************
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Numeric and Mathematical Modules
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********************************
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The modules described in this chapter provide numeric and math-related functions
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and data types. The :mod:`numbers` module defines an abstract hierarchy of
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numeric types. The :mod:`math` and :mod:`cmath` modules contain various
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mathematical functions for floating-point and complex numbers. For users more
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interested in decimal accuracy than in speed, the :mod:`decimal` module supports
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exact representations of decimal numbers.
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The following modules are documented in this chapter:
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.. toctree::
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numbers.rst
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math.rst
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cmath.rst
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decimal.rst
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rational.rst
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random.rst
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itertools.rst
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functools.rst
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operator.rst
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