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Development Tools — Python v2.6.6 documentation</title> <link rel="stylesheet" href="../_static/default.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../', VERSION: '2.6.6', COLLAPSE_MODINDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within Python v2.6.6 documentation" href="../_static/opensearch.xml"/> <link rel="author" title="About these documents" href="../about.html" /> <link rel="copyright" title="Copyright" href="../copyright.html" /> <link rel="top" title="Python v2.6.6 documentation" href="../index.html" /> <link rel="up" title="The Python Standard Library" href="index.html" /> <link rel="next" title="25.1. pydoc — Documentation generator and online help system" href="pydoc.html" /> <link rel="prev" title="24.6. Other Graphical User Interface Packages" href="othergui.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> </head> <body> <div class="related"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="../modindex.html" title="Global Module Index" accesskey="M">modules</a> |</li> <li class="right" > <a href="pydoc.html" title="25.1. pydoc — Documentation generator and online help system" accesskey="N">next</a> |</li> <li class="right" > <a href="othergui.html" title="24.6. Other Graphical User Interface Packages" accesskey="P">previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="../index.html">Python v2.6.6 documentation</a> »</li> <li><a href="index.html" accesskey="U">The Python Standard Library</a> »</li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body"> <div class="section" id="development-tools"> <span id="development"></span><h1>25. Development Tools<a class="headerlink" href="#development-tools" title="Permalink to this headline">¶</a></h1> <p>The modules described in this chapter help you write software. For example, the <a title="Documentation generator and online help system." class="reference external" href="pydoc.html#module-pydoc"><tt class="xref docutils literal"><span class="pre">pydoc</span></tt></a> module takes a module and generates documentation based on the module’s contents. The <a title="Test pieces of code within docstrings." class="reference external" href="doctest.html#module-doctest"><tt class="xref docutils literal"><span class="pre">doctest</span></tt></a> and <a title="Unit testing framework for Python." class="reference external" href="unittest.html#module-unittest"><tt class="xref docutils literal"><span class="pre">unittest</span></tt></a> modules contains frameworks for writing unit tests that automatically exercise code and verify that the expected output is produced. <strong>2to3</strong> can translate Python 2.x source code into valid Python 3.x code.</p> <p>The list of modules described in this chapter is:</p> <ul> <li class="toctree-l1"><a class="reference external" href="pydoc.html">25.1. <tt class="docutils literal"><span class="pre">pydoc</span></tt> — Documentation generator and online help system</a></li> <li class="toctree-l1"><a class="reference external" href="doctest.html">25.2. <tt class="docutils literal"><span class="pre">doctest</span></tt> — Test interactive Python examples</a><ul> <li class="toctree-l2"><a class="reference external" href="doctest.html#simple-usage-checking-examples-in-docstrings">25.2.1. Simple Usage: Checking Examples in Docstrings</a></li> <li class="toctree-l2"><a class="reference external" href="doctest.html#simple-usage-checking-examples-in-a-text-file">25.2.2. Simple Usage: Checking Examples in a Text File</a></li> <li class="toctree-l2"><a class="reference external" href="doctest.html#how-it-works">25.2.3. How It Works</a><ul> <li class="toctree-l3"><a class="reference external" href="doctest.html#which-docstrings-are-examined">25.2.3.1. Which Docstrings Are Examined?</a></li> <li class="toctree-l3"><a class="reference external" href="doctest.html#how-are-docstring-examples-recognized">25.2.3.2. How are Docstring Examples Recognized?</a></li> <li class="toctree-l3"><a class="reference external" href="doctest.html#what-s-the-execution-context">25.2.3.3. What’s the Execution Context?</a></li> <li class="toctree-l3"><a class="reference external" href="doctest.html#what-about-exceptions">25.2.3.4. What About Exceptions?</a></li> <li class="toctree-l3"><a class="reference external" href="doctest.html#option-flags-and-directives">25.2.3.5. Option Flags and Directives</a></li> <li class="toctree-l3"><a class="reference external" href="doctest.html#warnings">25.2.3.6. Warnings</a></li> </ul> </li> <li class="toctree-l2"><a class="reference external" href="doctest.html#basic-api">25.2.4. Basic API</a></li> <li class="toctree-l2"><a class="reference external" href="doctest.html#unittest-api">25.2.5. Unittest API</a></li> <li class="toctree-l2"><a class="reference external" href="doctest.html#advanced-api">25.2.6. Advanced API</a><ul> <li class="toctree-l3"><a class="reference external" href="doctest.html#doctest-objects">25.2.6.1. DocTest Objects</a></li> <li class="toctree-l3"><a class="reference external" href="doctest.html#example-objects">25.2.6.2. Example Objects</a></li> <li class="toctree-l3"><a class="reference external" href="doctest.html#doctestfinder-objects">25.2.6.3. DocTestFinder objects</a></li> <li class="toctree-l3"><a class="reference external" href="doctest.html#doctestparser-objects">25.2.6.4. DocTestParser objects</a></li> <li class="toctree-l3"><a class="reference external" href="doctest.html#doctestrunner-objects">25.2.6.5. DocTestRunner objects</a></li> <li class="toctree-l3"><a class="reference external" href="doctest.html#outputchecker-objects">25.2.6.6. OutputChecker objects</a></li> </ul> </li> <li class="toctree-l2"><a class="reference external" href="doctest.html#debugging">25.2.7. Debugging</a></li> <li class="toctree-l2"><a class="reference external" href="doctest.html#soapbox">25.2.8. Soapbox</a></li> </ul> </li> <li class="toctree-l1"><a class="reference external" href="unittest.html">25.3. <tt class="docutils literal"><span class="pre">unittest</span></tt> — Unit testing framework</a><ul> <li class="toctree-l2"><a class="reference external" href="unittest.html#basic-example">25.3.1. Basic example</a></li> <li class="toctree-l2"><a class="reference external" href="unittest.html#organizing-test-code">25.3.2. Organizing test code</a></li> <li class="toctree-l2"><a class="reference external" href="unittest.html#re-using-old-test-code">25.3.3. Re-using old test code</a></li> <li class="toctree-l2"><a class="reference external" href="unittest.html#classes-and-functions">25.3.4. Classes and functions</a></li> <li class="toctree-l2"><a class="reference external" href="unittest.html#testcase-objects">25.3.5. TestCase Objects</a></li> <li class="toctree-l2"><a class="reference external" href="unittest.html#testsuite-objects">25.3.6. TestSuite Objects</a></li> <li class="toctree-l2"><a class="reference external" href="unittest.html#testresult-objects">25.3.7. TestResult Objects</a></li> <li class="toctree-l2"><a class="reference external" href="unittest.html#testloader-objects">25.3.8. TestLoader Objects</a></li> </ul> </li> <li class="toctree-l1"><a class="reference external" href="2to3.html">25.4. 2to3 - Automated Python 2 to 3 code translation</a><ul> <li class="toctree-l2"><a class="reference external" href="2to3.html#using-2to3">25.4.1. Using 2to3</a></li> <li class="toctree-l2"><a class="reference external" href="2to3.html#fixers">25.4.2. Fixers</a></li> <li class="toctree-l2"><a class="reference external" href="2to3.html#module-lib2to3">25.4.3. <tt class="docutils literal"><span class="pre">lib2to3</span></tt> - 2to3’s library</a></li> </ul> </li> <li class="toctree-l1"><a class="reference external" href="test.html">25.5. <tt class="docutils literal"><span class="pre">test</span></tt> — Regression tests package for Python</a><ul> <li class="toctree-l2"><a class="reference external" href="test.html#writing-unit-tests-for-the-test-package">25.5.1. Writing Unit Tests for the <tt class="docutils literal"><span class="pre">test</span></tt> package</a></li> <li class="toctree-l2"><a class="reference external" href="test.html#running-tests-using-test-regrtest">25.5.2. Running tests using <tt class="docutils literal"><span class="pre">test.regrtest</span></tt></a></li> </ul> </li> <li class="toctree-l1"><a class="reference external" href="test.html#module-test.test_support">25.6. <tt class="docutils literal"><span class="pre">test.test_support</span></tt> — Utility functions for tests</a></li> </ul> </div> </div> </div> </div> <div class="sphinxsidebar"> <div class="sphinxsidebarwrapper"> <h4>Previous topic</h4> <p class="topless"><a href="othergui.html" title="previous chapter">24.6. Other Graphical User Interface Packages</a></p> <h4>Next topic</h4> <p class="topless"><a href="pydoc.html" title="next chapter">25.1. <tt class="docutils literal"><span class="pre">pydoc</span></tt> — Documentation generator and online help system</a></p> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../bugs.html">Report a Bug</a></li> <li><a href="../_sources/library/development.txt" rel="nofollow">Show Source</a></li> </ul> <div id="searchbox" style="display: none"> <h3>Quick search</h3> <form class="search" action="../search.html" method="get"> <input type="text" name="q" size="18" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> <p class="searchtip" style="font-size: 90%"> Enter search terms or a module, class or function name. </p> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <div class="clearer"></div> </div> <div class="related"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="../modindex.html" title="Global Module Index" >modules</a> |</li> <li class="right" > <a href="pydoc.html" title="25.1. pydoc — Documentation generator and online help system" >next</a> |</li> <li class="right" > <a href="othergui.html" title="24.6. 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