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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>18.1.8. email.errors: Exception and Defect classes — Python 2.7.18 documentation</title> <link rel="stylesheet" href="../_static/classic.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript" id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <script type="text/javascript" src="../_static/language_data.js"></script> <script type="text/javascript" src="../_static/sidebar.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within Python 2.7.18 documentation" href="../_static/opensearch.xml"/> <link rel="author" title="About these documents" href="../about.html" /> <link rel="index" title="Index" href="../genindex.html" /> <link rel="search" title="Search" href="../search.html" /> <link rel="copyright" title="Copyright" href="../copyright.html" /> <link rel="next" title="18.1.9. email.utils: Miscellaneous utilities" href="email.utils.html" /> <link rel="prev" title="18.1.7. email.encoders: Encoders" href="email.encoders.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> <link rel="canonical" href="file:///usr/share/doc/python2.7/html/library/email.errors.html" /> <script type="text/javascript" src="../_static/copybutton.js"></script> </head><body> <div id="outdated-warning" style="padding: .5em; text-align: center; background-color: #FFBABA; color: #6A0E0E;"> This document is for an old version of Python that is <a href="https://devguide.python.org/devcycle/#end-of-life-branches">no longer supported</a>. You should install the python3 and python3-doc packages and read the <a href="file:///usr/share/doc/python3-doc/html/library/email.errors.html"> Python documentation for the Python3 version packaged in this release</a>. </div> <div class="related" role="navigation" aria-label="related navigation"> <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="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="email.utils.html" title="18.1.9. email.utils: Miscellaneous utilities" accesskey="N">next</a> |</li> <li class="right" > <a href="email.encoders.html" title="18.1.7. email.encoders: Encoders" accesskey="P">previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> »</li> <li> <a href="../index.html">Python 2.7.18 documentation</a> » </li> <li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li> <li class="nav-item nav-item-2"><a href="netdata.html" >18. Internet Data Handling</a> »</li> <li class="nav-item nav-item-3"><a href="email.html" accesskey="U">18.1. <code class="docutils literal notranslate"><span class="pre">email</span></code> — An email and MIME handling package</a> »</li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <div class="section" id="module-email.errors"> <span id="email-errors-exception-and-defect-classes"></span><h1>18.1.8. <a class="reference internal" href="#module-email.errors" title="email.errors: The exception classes used by the email package."><code class="xref py py-mod docutils literal notranslate"><span class="pre">email.errors</span></code></a>: Exception and Defect classes<a class="headerlink" href="#module-email.errors" title="Permalink to this headline">¶</a></h1> <p>The following exception classes are defined in the <a class="reference internal" href="#module-email.errors" title="email.errors: The exception classes used by the email package."><code class="xref py py-mod docutils literal notranslate"><span class="pre">email.errors</span></code></a> module:</p> <dl class="exception"> <dt id="email.errors.MessageError"> <em class="property">exception </em><code class="descclassname">email.errors.</code><code class="descname">MessageError</code><a class="headerlink" href="#email.errors.MessageError" title="Permalink to this definition">¶</a></dt> <dd><p>This is the base class for all exceptions that the <a class="reference internal" href="email.html#module-email" title="email: Package supporting the parsing, manipulating, and generating email messages, including MIME documents."><code class="xref py py-mod docutils literal notranslate"><span class="pre">email</span></code></a> package can raise. It is derived from the standard <a class="reference internal" href="exceptions.html#exceptions.Exception" title="exceptions.Exception"><code class="xref py py-exc docutils literal notranslate"><span class="pre">Exception</span></code></a> class and defines no additional methods.</p> </dd></dl> <dl class="exception"> <dt id="email.errors.MessageParseError"> <em class="property">exception </em><code class="descclassname">email.errors.</code><code class="descname">MessageParseError</code><a class="headerlink" href="#email.errors.MessageParseError" title="Permalink to this definition">¶</a></dt> <dd><p>This is the base class for exceptions raised by the <a class="reference internal" href="email.parser.html#email.parser.Parser" title="email.parser.Parser"><code class="xref py py-class docutils literal notranslate"><span class="pre">Parser</span></code></a> class. It is derived from <a class="reference internal" href="#email.errors.MessageError" title="email.errors.MessageError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">MessageError</span></code></a>.</p> </dd></dl> <dl class="exception"> <dt id="email.errors.HeaderParseError"> <em class="property">exception </em><code class="descclassname">email.errors.</code><code class="descname">HeaderParseError</code><a class="headerlink" href="#email.errors.HeaderParseError" title="Permalink to this definition">¶</a></dt> <dd><p>Raised under some error conditions when parsing the <span class="target" id="index-0"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc2822.html"><strong>RFC 2822</strong></a> headers of a message, this class is derived from <a class="reference internal" href="#email.errors.MessageParseError" title="email.errors.MessageParseError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">MessageParseError</span></code></a>. It can be raised from the <a class="reference internal" href="email.parser.html#email.parser.Parser.parse" title="email.parser.Parser.parse"><code class="xref py py-meth docutils literal notranslate"><span class="pre">Parser.parse</span></code></a> or <a class="reference internal" href="email.parser.html#email.parser.Parser.parsestr" title="email.parser.Parser.parsestr"><code class="xref py py-meth docutils literal notranslate"><span class="pre">Parser.parsestr</span></code></a> methods.</p> <p>Situations where it can be raised include finding an envelope header after the first <span class="target" id="index-1"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc2822.html"><strong>RFC 2822</strong></a> header of the message, finding a continuation line before the first <span class="target" id="index-2"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc2822.html"><strong>RFC 2822</strong></a> header is found, or finding a line in the headers which is neither a header or a continuation line.</p> </dd></dl> <dl class="exception"> <dt id="email.errors.BoundaryError"> <em class="property">exception </em><code class="descclassname">email.errors.</code><code class="descname">BoundaryError</code><a class="headerlink" href="#email.errors.BoundaryError" title="Permalink to this definition">¶</a></dt> <dd><p>Raised under some error conditions when parsing the <span class="target" id="index-3"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc2822.html"><strong>RFC 2822</strong></a> headers of a message, this class is derived from <a class="reference internal" href="#email.errors.MessageParseError" title="email.errors.MessageParseError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">MessageParseError</span></code></a>. It can be raised from the <a class="reference internal" href="email.parser.html#email.parser.Parser.parse" title="email.parser.Parser.parse"><code class="xref py py-meth docutils literal notranslate"><span class="pre">Parser.parse</span></code></a> or <a class="reference internal" href="email.parser.html#email.parser.Parser.parsestr" title="email.parser.Parser.parsestr"><code class="xref py py-meth docutils literal notranslate"><span class="pre">Parser.parsestr</span></code></a> methods.</p> <p>Situations where it can be raised include not being able to find the starting or terminating boundary in a <em class="mimetype">multipart/*</em> message when strict parsing is used.</p> </dd></dl> <dl class="exception"> <dt id="email.errors.MultipartConversionError"> <em class="property">exception </em><code class="descclassname">email.errors.</code><code class="descname">MultipartConversionError</code><a class="headerlink" href="#email.errors.MultipartConversionError" title="Permalink to this definition">¶</a></dt> <dd><p>Raised when a payload is added to a <a class="reference internal" href="email.message.html#email.message.Message" title="email.message.Message"><code class="xref py py-class docutils literal notranslate"><span class="pre">Message</span></code></a> object using <code class="xref py py-meth docutils literal notranslate"><span class="pre">add_payload()</span></code>, but the payload is already a scalar and the message’s <em class="mailheader">Content-Type</em> main type is not either <em class="mimetype">multipart</em> or missing. <a class="reference internal" href="#email.errors.MultipartConversionError" title="email.errors.MultipartConversionError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">MultipartConversionError</span></code></a> multiply inherits from <a class="reference internal" href="#email.errors.MessageError" title="email.errors.MessageError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">MessageError</span></code></a> and the built-in <a class="reference internal" href="exceptions.html#exceptions.TypeError" title="exceptions.TypeError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">TypeError</span></code></a>.</p> <p>Since <code class="xref py py-meth docutils literal notranslate"><span class="pre">Message.add_payload()</span></code> is deprecated, this exception is rarely raised in practice. However the exception may also be raised if the <a class="reference internal" href="email.message.html#email.message.Message.attach" title="email.message.Message.attach"><code class="xref py py-meth docutils literal notranslate"><span class="pre">attach()</span></code></a> method is called on an instance of a class derived from <a class="reference internal" href="email.mime.html#email.mime.nonmultipart.MIMENonMultipart" title="email.mime.nonmultipart.MIMENonMultipart"><code class="xref py py-class docutils literal notranslate"><span class="pre">MIMENonMultipart</span></code></a> (e.g. <a class="reference internal" href="email.mime.html#email.mime.image.MIMEImage" title="email.mime.image.MIMEImage"><code class="xref py py-class docutils literal notranslate"><span class="pre">MIMEImage</span></code></a>).</p> </dd></dl> <p>Here’s the list of the defects that the <a class="reference internal" href="email.parser.html#email.parser.FeedParser" title="email.parser.FeedParser"><code class="xref py py-class docutils literal notranslate"><span class="pre">FeedParser</span></code></a> can find while parsing messages. Note that the defects are added to the message where the problem was found, so for example, if a message nested inside a <em class="mimetype">multipart/alternative</em> had a malformed header, that nested message object would have a defect, but the containing messages would not.</p> <p>All defect classes are subclassed from <code class="xref py py-class docutils literal notranslate"><span class="pre">email.errors.MessageDefect</span></code>, but this class is <em>not</em> an exception!</p> <div class="versionadded"> <p><span class="versionmodified">New in version 2.4: </span>All the defect classes were added.</p> </div> <ul class="simple"> <li><code class="xref py py-class docutils literal notranslate"><span class="pre">NoBoundaryInMultipartDefect</span></code> – A message claimed to be a multipart, but had no <em class="mimetype">boundary</em> parameter.</li> <li><code class="xref py py-class docutils literal notranslate"><span class="pre">StartBoundaryNotFoundDefect</span></code> – The start boundary claimed in the <em class="mailheader">Content-Type</em> header was never found.</li> <li><code class="xref py py-class docutils literal notranslate"><span class="pre">FirstHeaderLineIsContinuationDefect</span></code> – The message had a continuation line as its first header line.</li> <li><code class="xref py py-class docutils literal notranslate"><span class="pre">MisplacedEnvelopeHeaderDefect</span></code> - A “Unix From” header was found in the middle of a header block.</li> <li><code class="xref py py-class docutils literal notranslate"><span class="pre">MalformedHeaderDefect</span></code> – A header was found that was missing a colon, or was otherwise malformed.</li> <li><code class="xref py py-class docutils literal notranslate"><span class="pre">MultipartInvariantViolationDefect</span></code> – A message claimed to be a <em class="mimetype">multipart</em>, but no subparts were found. Note that when a message has this defect, its <a class="reference internal" href="email.message.html#email.message.Message.is_multipart" title="email.message.Message.is_multipart"><code class="xref py py-meth docutils literal notranslate"><span class="pre">is_multipart()</span></code></a> method may return false even though its content type claims to be <em class="mimetype">multipart</em>.</li> </ul> </div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h4>Previous topic</h4> <p class="topless"><a href="email.encoders.html" title="previous chapter">18.1.7. <code class="docutils literal notranslate"><span class="pre">email.encoders</span></code>: Encoders</a></p> <h4>Next topic</h4> <p class="topless"><a href="email.utils.html" title="next chapter">18.1.9. <code class="docutils literal notranslate"><span class="pre">email.utils</span></code>: Miscellaneous utilities</a></p> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../_sources/library/email.errors.rst.txt" rel="nofollow">Show Source</a></li> </ul> </div> <div id="searchbox" style="display: none" role="search"> <h3>Quick search</h3> <div class="searchformwrapper"> <form class="search" action="../search.html" method="get"> <input type="text" name="q" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <div class="clearer"></div> </div> <div class="related" role="navigation" aria-label="related navigation"> <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="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="email.utils.html" title="18.1.9. email.utils: Miscellaneous utilities" >next</a> |</li> <li class="right" > <a href="email.encoders.html" title="18.1.7. email.encoders: Encoders" >previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> »</li> <li> <a href="../index.html">Python 2.7.18 documentation</a> » </li> <li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li> <li class="nav-item nav-item-2"><a href="netdata.html" >18. 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