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#23891: describe a few more modules in the tutorial

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Andrew Kuchling 2015-04-09 22:20:01 -04:00
parent 07c002573a
commit d71b170a4d
1 changed files with 24 additions and 7 deletions
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Doc/tutorial/stdlib.rst
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@ -140,6 +140,18 @@ The :mod:`random` module provides tools for making random selections::
>>> random.randrange(6) # random integer chosen from range(6) >>> random.randrange(6) # random integer chosen from range(6)
4 4
The :mod:`statistics` module calculates basic statistical properties
(the mean, median, variance, etc.) of numeric data::
>>> import statistics
>>> data = [2.75, 1.75, 1.25, 0.25, 0.5, 1.25, 3.5]
>>> statistics.mean(data)
1.6071428571428572
>>> statistics.median(data)
1.25
>>> statistics.variance(data)
1.3720238095238095
The SciPy project <http://scipy.org> has many other modules for numerical The SciPy project <http://scipy.org> has many other modules for numerical
computations. computations.
@ -311,13 +323,18 @@ sophisticated and robust capabilities of its larger packages. For example:
(including attachments) and for implementing internet encoding and header (including attachments) and for implementing internet encoding and header
protocols. protocols.
* The :mod:`xml.dom` and :mod:`xml.sax` packages provide robust support for * The :mod:`json` package provides robust support for parsing this
parsing this popular data interchange format. Likewise, the :mod:`csv` module popular data interchange format. The :mod:`csv` module supports
supports direct reads and writes in a common database format. Together, these direct reading and writing of files in Comma-Separated Value format,
modules and packages greatly simplify data interchange between Python commonly supported by databases and spreadsheets. XML processing is
applications and other tools. supported by the :mod:`xml.etree.ElementTree`, :mod:`xml.dom` and
:mod:`xml.sax` packages. Together, these modules and packages
greatly simplify data interchange between Python applications and
other tools.
* The :mod:`sqlite3` module is a wrapper for the SQLite database
library, providing a persistent database that can be updated and
accessed using slightly nonstandard SQL syntax.
* Internationalization is supported by a number of modules including * Internationalization is supported by a number of modules including
:mod:`gettext`, :mod:`locale`, and the :mod:`codecs` package. :mod:`gettext`, :mod:`locale`, and the :mod:`codecs` package.