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<title>Development Tools &#8212; Python 3.7.4 documentation</title>
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<span id="development"></span><h1>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 class="reference internal" href="pydoc.html#module-pydoc" title="pydoc: Documentation generator and online help system."><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydoc</span></code></a> module takes a module and generates documentation based on the
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frameworks for writing unit tests that automatically exercise code and verify
that the expected output is produced. <strong class="program">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>
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<li class="toctree-l1"><a class="reference internal" href="doctest.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">doctest</span></code> — Test interactive Python examples</a><ul>
<li class="toctree-l2"><a class="reference internal" href="doctest.html#simple-usage-checking-examples-in-docstrings">Simple Usage: Checking Examples in Docstrings</a></li>
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<li class="toctree-l3"><a class="reference internal" href="doctest.html#which-docstrings-are-examined">Which Docstrings Are Examined?</a></li>
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<li class="toctree-l2"><a class="reference internal" href="doctest.html#unittest-api">Unittest API</a></li>
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<li class="toctree-l1"><a class="reference internal" href="2to3.html">2to3 - Automated Python 2 to 3 code translation</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="2to3.html#fixers">Fixers</a></li>
<li class="toctree-l2"><a class="reference internal" href="2to3.html#module-lib2to3"><code class="xref py py-mod docutils literal notranslate"><span class="pre">lib2to3</span></code> - 2to3’s library</a></li>
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<li class="toctree-l1"><a class="reference internal" href="test.html"><code class="xref py py-mod docutils literal notranslate"><span class="pre">test</span></code> — Regression tests package for Python</a><ul>
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<li class="toctree-l1"><a class="reference internal" href="test.html#module-test.support"><code class="xref py py-mod docutils literal notranslate"><span class="pre">test.support</span></code> — Utilities for the Python test suite</a></li>
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<p>See also the Python development mode: the <a class="reference internal" href="../using/cmdline.html#id5"><code class="xref std std-option docutils literal notranslate"><span class="pre">-X</span></code></a> <code class="docutils literal notranslate"><span class="pre">dev</span></code> option and
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