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<h1 class="page-title">PEP 2 – Procedure for Adding New Modules</h1>
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<dl class="rfc2822 field-list simple">
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<dt class="field-odd">Author<span class="colon">:</span></dt>
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<dd class="field-odd">Brett Cannon <brett at python.org>,
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Martijn Faassen <faassen at infrae.com></dd>
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<dt class="field-even">Status<span class="colon">:</span></dt>
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<dd class="field-even"><abbr title="Currently valid informational guidance, or an in-use process">Active</abbr></dd>
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<dt class="field-odd">Type<span class="colon">:</span></dt>
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<dd class="field-odd"><abbr title="Normative PEP describing or proposing a change to a Python community process, workflow or governance">Process</abbr></dd>
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<dt class="field-even">Created<span class="colon">:</span></dt>
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<dd class="field-even">07-Jul-2001</dd>
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<dt class="field-odd">Post-History<span class="colon">:</span></dt>
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<dd class="field-odd">07-Jul-2001, 09-Mar-2002</dd>
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<details><summary>Table of Contents</summary><ul class="simple">
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<li><a class="reference internal" href="#introduction">Introduction</a></li>
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<li><a class="reference internal" href="#acceptance-procedure">Acceptance Procedure</a></li>
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<li><a class="reference internal" href="#maintenance-procedure">Maintenance Procedure</a></li>
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<li><a class="reference internal" href="#copyright">Copyright</a></li>
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</ul>
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</details></section>
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<section id="introduction">
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<h2><a class="toc-backref" href="#introduction" role="doc-backlink">Introduction</a></h2>
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<p>The Python Standard Library contributes significantly to Python’s
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success. The language comes with “batteries included”, so it is easy
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for people to become productive with just the standard library alone.
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It is therefore important that the usefulness of the standard library
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be maintained.</p>
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<p>Due to the visibility and importance of the standard library, it must
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be maintained thoughtfully. As such, any code within it must be
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maintained by Python’s development team which leads to a perpetual
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cost to each addition made. There is also added cognitive load for
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users in familiarizing themselves with what is in the standard
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library to be considered.</p>
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<p>New functionality is commonly added to the library in the form of new
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modules. This PEP will describe the procedure for the <em>addition</em> of
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new modules. <a class="pep reference internal" href="../pep-0004/" title="PEP 4 – Deprecation of Standard Modules">PEP 4</a> deals with procedures for deprecation of modules;
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the <em>removal</em> of old and unused modules from the standard library.</p>
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</section>
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<section id="acceptance-procedure">
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<h2><a class="toc-backref" href="#acceptance-procedure" role="doc-backlink">Acceptance Procedure</a></h2>
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<p>For top-level modules/packages, a PEP is required. The procedure for
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writing a PEP is covered in <a class="pep reference internal" href="../pep-0001/" title="PEP 1 – PEP Purpose and Guidelines">PEP 1</a>.</p>
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<p>For submodules of a preexisting package in the standard library,
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additions are at the discretion of the general Python development team
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and its members.</p>
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<p>General guidance on what modules typically are accepted into the
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standard library, the overall process, etc. are covered in the
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<a class="reference external" href="https://devguide.python.org/stdlibchanges/">developer’s guide</a>.</p>
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</section>
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<section id="maintenance-procedure">
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<h2><a class="toc-backref" href="#maintenance-procedure" role="doc-backlink">Maintenance Procedure</a></h2>
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<p>Anything accepted into the standard library is expected to be
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primarily maintained there, within Python’s development infrastructure.
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While some members of the development team may choose to maintain a
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backport of a module outside of the standard library, it is up to them
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to keep their external code in sync as appropriate.</p>
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</section>
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<section id="copyright">
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<h2><a class="toc-backref" href="#copyright" role="doc-backlink">Copyright</a></h2>
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<p>This document has been placed in the public domain.</p>
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</section>
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</section>
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<hr class="docutils" />
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<p>Source: <a class="reference external" href="https://github.com/python/peps/blob/main/peps/pep-0002.rst">https://github.com/python/peps/blob/main/peps/pep-0002.rst</a></p>
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<p>Last modified: <a class="reference external" href="https://github.com/python/peps/commits/main/peps/pep-0002.rst">2023-09-09 17:39:29 GMT</a></p>
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</article>
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<nav id="pep-sidebar">
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<h2>Contents</h2>
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<ul>
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<li><a class="reference internal" href="#introduction">Introduction</a></li>
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<li><a class="reference internal" href="#acceptance-procedure">Acceptance Procedure</a></li>
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<li><a class="reference internal" href="#maintenance-procedure">Maintenance Procedure</a></li>
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<li><a class="reference internal" href="#copyright">Copyright</a></li>
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</ul>
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