“batteries included” philosophy
https://docs.djangoproject.com/en/2.2/ref/contrib/
contrib packages
Django aims to follow Python’s “batteries included” philosophy. It ships with a variety of extra, optional tools that solve common Web-development problems.
This code lives in django/contrib in the Django distribution. This document gives a rundown of the packages in contrib, along with any dependencies those packages have.
https://docs.python.org/3/tutorial/stdlib.html#tut-batteries-included
10.12. Batteries Included
Python has a “batteries included” philosophy. This is best seen through the sophisticated and robust capabilities of its larger packages. For example:
-
The
xmlrpc.clientandxmlrpc.servermodules make implementing remote procedure calls into an almost trivial task. Despite the modules names, no direct knowledge or handling of XML is needed. -
The
emailpackage is a library for managing email messages, including MIME and other RFC 2822-based message documents. Unlikesmtplibandpoplibwhich actually send and receive messages, the email package has a complete toolset for building or decoding complex message structures (including attachments) and for implementing internet encoding and header protocols. -
The
jsonpackage provides robust support for parsing this popular data interchange format. Thecsvmodule supports direct reading and writing of files in Comma-Separated Value format, commonly supported by databases and spreadsheets. XML processing is supported by thexml.etree.ElementTree,xml.domandxml.saxpackages. Together, these modules and packages greatly simplify data interchange between Python applications and other tools. -
The
sqlite3module 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
gettext,locale, and thecodecspackage.

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