traverseda
/
cpython
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Issue 3412: Mention fractions and decimal in the tutorial section on floating point.

This commit is contained in:
Raymond Hettinger 2008-10-05 17:57:52 +00:00
parent 9fce0ba9e2
commit eba99dfde8
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Doc/tutorial/floatingpoint.rst
View File

@ -135,6 +135,14 @@ display of your final results to the number of decimal digits you expect.
:func:`str` usually suffices, and for finer control see the :meth:`str.format` :func:`str` usually suffices, and for finer control see the :meth:`str.format`
method's format specifiers in :ref:`formatstrings`. method's format specifiers in :ref:`formatstrings`.
For use cases which require exact decimal representation, try using the
:mod:`decimal` module which implements decimal arithmetic suitable for
accounting applications and high-precision applications.
Another form of exact arithmetic is supported by the :mod:`fractions` module
which implements arithmetic based on rational numbers (so the numbers like
1/3 can be represented exactly).
If you are a heavy user of floating point operations you should take a look If you are a heavy user of floating point operations you should take a look
at the Numerical Python package and many other packages for mathematical and at the Numerical Python package and many other packages for mathematical and
statistical operations supplied by the SciPy project. See <http://scipy.org>. statistical operations supplied by the SciPy project. See <http://scipy.org>.