Source code: Lib/unittest/__init__.py(If you are already familiar with the basic concepts of testing, you might want to skip to the list of assert methods.) The unittest unit testing framework was ...

Source code: Lib/decimal.py The decimal module provides support for fast correctly rounded decimal floating-point arithmetic. It offers several advantages over the float datatype: Decimal “is based...

This chapter explains the meaning of the elements of expressions in Python. Syntax Notes: In this and the following chapters, extended BNF notation will be used to describe syntax, not lexical anal...

Author, A.M. Kuchling,. This article explains the new features in Python 2.3. Python 2.3 was released on July 29, 2003. The main themes for Python 2.3 are polishing some of the features added in 2....

Source code: Lib/imaplib.py This module defines three classes, IMAP4, IMAP4_SSL and IMAP4_stream, which encapsulate a connection to an IMAP4 server and implement a large subset of the IMAP4rev1 cli...

Source code: Lib/xml/dom/__init__.py The Document Object Model, or “DOM,” is a cross-language API from the World Wide Web Consortium (W3C) for accessing and modifying XML documents. A DOM implement...

Pending Removal in Python 3.14: The import system:- Setting__loader__ on a module while failing to set__spec__.loader is deprecated. In Python 3.14,__loader__ will cease to be set or taken into con...

The test package contains all regression tests for Python as well as the modules test.support and test.regrtest. test.support is used to enhance your tests while test.regrtest drives the testing su...

The modules described in this chapter implement internet protocols and support for related technology. They are all implemented in Python. Most of these modules require the presence of the system-d...

Author, A.M. Kuchling (amk at amk.ca),. This article explains the new features in Python 2.6, released on October 1, 2008. The release schedule is described in PEP 361. The major theme of Python 2....