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<h1 class="page-title">PEP 332 – Byte vectors and String/Unicode Unification</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">Skip Montanaro <skip at pobox.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="Formally declined and will not be accepted">Rejected</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 with a new feature for Python, implementation change for CPython or interoperability standard for the ecosystem">Standards Track</abbr></dd>
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<dt class="field-even">Created<span class="colon">:</span></dt>
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<dd class="field-even">11-Aug-2004</dd>
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<dt class="field-odd">Python-Version<span class="colon">:</span></dt>
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<dd class="field-odd">2.5</dd>
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<dt class="field-even">Post-History<span class="colon">:</span></dt>
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<dd class="field-even"><p></p></dd>
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<details><summary>Table of Contents</summary><ul class="simple">
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<li><a class="reference internal" href="#abstract">Abstract</a></li>
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<li><a class="reference internal" href="#rejection-notice">Rejection Notice</a></li>
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<li><a class="reference internal" href="#rationale">Rationale</a></li>
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<li><a class="reference internal" href="#proposed-implementation">Proposed Implementation</a></li>
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<li><a class="reference internal" href="#bytes-object-api">Bytes Object API</a></li>
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<li><a class="reference internal" href="#issues">Issues</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="abstract">
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<h2><a class="toc-backref" href="#abstract" role="doc-backlink">Abstract</a></h2>
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<p>This PEP outlines the introduction of a raw <code class="docutils literal notranslate"><span class="pre">bytes</span></code> sequence object
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and the unification of the current <code class="docutils literal notranslate"><span class="pre">str</span></code> and <code class="docutils literal notranslate"><span class="pre">unicode</span></code> objects.</p>
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</section>
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<section id="rejection-notice">
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<h2><a class="toc-backref" href="#rejection-notice" role="doc-backlink">Rejection Notice</a></h2>
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<p>This PEP is rejected in this form. The author has expressed lack of
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time to continue to shepherd it, and discussion on python-dev has
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moved to a slightly different proposal which will (eventually) be
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written up as a new PEP. See the thread starting at
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<a class="reference external" href="https://mail.python.org/pipermail/python-dev/2006-February/060930.html">https://mail.python.org/pipermail/python-dev/2006-February/060930.html</a>.</p>
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</section>
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<section id="rationale">
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<h2><a class="toc-backref" href="#rationale" role="doc-backlink">Rationale</a></h2>
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<p>Python’s current string objects are overloaded. They serve both to
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hold ASCII and non-ASCII character data and to also hold sequences of
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raw bytes which have no reasonable interpretation as displayable
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character sequences. This overlap hasn’t been a big problem in the
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past, but as Python moves closer to requiring source code to be
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properly encoded, the use of strings to represent raw byte sequences
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will be more problematic. In addition, as Python’s Unicode support
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has improved, it’s easier to consider strings as ASCII-encoded Unicode
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objects.</p>
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</section>
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<section id="proposed-implementation">
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<h2><a class="toc-backref" href="#proposed-implementation" role="doc-backlink">Proposed Implementation</a></h2>
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<p>The number in parentheses indicates the Python version in which the
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feature will be introduced.</p>
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<ul class="simple">
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<li>Add a <code class="docutils literal notranslate"><span class="pre">bytes</span></code> builtin which is just a synonym for <code class="docutils literal notranslate"><span class="pre">str</span></code>. (2.5)</li>
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<li>Add a <code class="docutils literal notranslate"><span class="pre">b"..."</span></code> string literal which is equivalent to raw string
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literals, with the exception that values which conflict with the
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source encoding of the containing file not generate warnings. (2.5)</li>
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<li>Warn about the use of variables named “bytes”. (2.5 or 2.6)</li>
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<li>Introduce a <code class="docutils literal notranslate"><span class="pre">bytes</span></code> builtin which refers to a sequence distinct
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from the <code class="docutils literal notranslate"><span class="pre">str</span></code> type. (2.6)</li>
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<li>Make <code class="docutils literal notranslate"><span class="pre">str</span></code> a synonym for <code class="docutils literal notranslate"><span class="pre">unicode</span></code>. (3.0)</li>
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</ul>
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</section>
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<section id="bytes-object-api">
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<h2><a class="toc-backref" href="#bytes-object-api" role="doc-backlink">Bytes Object API</a></h2>
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<p>TBD.</p>
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</section>
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<section id="issues">
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<h2><a class="toc-backref" href="#issues" role="doc-backlink">Issues</a></h2>
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<ul class="simple">
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<li>Can this be accomplished before Python 3.0?</li>
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<li>Should <code class="docutils literal notranslate"><span class="pre">bytes</span></code> objects be mutable or immutable? (Guido seems to
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like them to be mutable.)</li>
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</ul>
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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-0332.rst">https://github.com/python/peps/blob/main/peps/pep-0332.rst</a></p>
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<p>Last modified: <a class="reference external" href="https://github.com/python/peps/commits/main/peps/pep-0332.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="#abstract">Abstract</a></li>
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<li><a class="reference internal" href="#rejection-notice">Rejection Notice</a></li>
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<li><a class="reference internal" href="#rationale">Rationale</a></li>
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<li><a class="reference internal" href="#proposed-implementation">Proposed Implementation</a></li>
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<li><a class="reference internal" href="#bytes-object-api">Bytes Object API</a></li>
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<li><a class="reference internal" href="#issues">Issues</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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<br>
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<a id="source" href="https://github.com/python/peps/blob/main/peps/pep-0332.rst">Page Source (GitHub)</a>
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