Issue 18165: Add 'unexpected_type' to TypeError

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Problem</a></li> </ul> </li> </ul> </li> </ul> </div>  </div>  <div id="content-body"> <div id="body-main"> <div id="content"> <div id="breadcrumb"> Issue18165 </div> <div id="migration-notice"> <div id="migration-images"> <img width="32" src="@@file/python-logo-small.png" /> ➜ <a href="https://github.com/python/cpython/issues"><img width="32" src="@@file/gh-icon.png" /></a> </div> <p>This issue tracker <b>has been migrated to <a href="https://github.com/python/cpython/issues">GitHub</a></b>, and is currently <b>read-only</b>.<br /> For more information, <a title="GitHub FAQs" href="https://devguide.python.org/gh-faq/"> see the GitHub FAQs in the Python's Developer Guide.</a></p> </div> <div> <form method="post" name="itemSynopsis" onsubmit="return submit_once()" enctype="multipart/form-data" action="issue18165"> <div id="gh-issue-link"> <a href="https://github.com/python/cpython/issues/62365"> <img width="32" src="@@file/gh-icon.png" /> <p> <span>This issue has been migrated to GitHub:</span> https://github.com/python/cpython/issues/62365 </p> </a> </div> <fieldset><legend>classification</legend> <table class="form"> <tr> <th class="required"><a href="http://docs.python.org/devguide/triaging.html#title" target="_blank">Title</a>:</th> <td colspan="3"> <span>Add 'unexpected_type' to TypeError</span> <input type="hidden" name="title" value="Add 'unexpected_type' to TypeError"> </td> </tr> <tr> <th class="required"><a href="http://docs.python.org/devguide/triaging.html#type" target="_blank">Type</a>:</th> <td>enhancement</td> <th><a href="http://docs.python.org/devguide/triaging.html#stage" target="_blank">Stage</a>:</th> <td>test needed</td> </tr> <tr> <th><a href="http://docs.python.org/devguide/triaging.html#components" target="_blank">Components</a>:</th> <td>Interpreter Core</td> <th><a href="http://docs.python.org/devguide/triaging.html#versions" target="_blank">Versions</a>:</th> <td>Python 3.5</td> </tr> </table> </fieldset> <fieldset><legend>process</legend> <table class="form"> <tr> <th><a href="http://docs.python.org/devguide/triaging.html#status" target="_blank">Status</a>:</th> <td>open</td> <th><a href="http://docs.python.org/devguide/triaging.html#resolution" target="_blank">Resolution</a>:</th> <td></td> </tr> <tr> <th> <a href="http://docs.python.org/devguide/triaging.html#dependencies" target="_blank">Dependencies</a>: </th> <td> </td> <th><a href="http://docs.python.org/devguide/triaging.html#superseder" target="_blank">Superseder</a>:</th> <td> </td> </tr> <tr> <th> <a href="http://docs.python.org/devguide/triaging.html#assigned-to" target="_blank">Assigned To</a>: </th> <td> </td> <th> <a href="http://docs.python.org/devguide/triaging.html#nosy-list" target="_blank">Nosy List</a>: </th> <td> barry, brett.cannon, ezio.melotti </td> </tr> <tr> <th> <a href="http://docs.python.org/devguide/triaging.html#priority" target="_blank">Priority</a>: </th> <td>normal</td> <th> <a href="http://docs.python.org/devguide/triaging.html#keywords" target="_blank">Keywords</a>: </th> <td></td> </tr> </table> </fieldset> </form> <p>Created on <strong>2013-06-07 20:55</strong> by <strong>brett.cannon</strong>, last changed <strong>2022-04-11 14:57</strong> by <strong>admin</strong>.</p> <table class="messages"> <tr><th colspan="4" class="header">Messages (3)</th></tr> <tr> <th> <a href="#msg190780" id="msg190780">msg190780</a> - <a href="msg190780">(view)</a></th> <th>Author: Brett Cannon (brett.cannon) <span title="Contributor form received">*</span> <img src="@@file/committer.png" title="Python committer" alt="(Python committer)" /></th> <th>Date: 2013-06-07 20:55</th> </tr> <tr> <td colspan="4" class="content"> <pre>TypeError could grow an 'unexpected_type' attribute to store the type of the argument that was used to trigger the exception. Since types are expected to not be deleted there is no GC worry. Having an 'expected' attribute makes no sense in the face of a union of types, etc. (unless the assumption of a frozenset is made for the attribute). Plus exceptions typically do not contain info on what would have been acceptable (although in this instance it may make sense).</pre> </td> </tr> <tr> <th> <a href="#msg228593" id="msg228593">msg228593</a> - <a href="msg228593">(view)</a></th> <th>Author: Mark Lawrence (BreamoreBoy) <span title="Contributor form received">*</span></th> <th>Date: 2014-10-05 17:31</th> </tr> <tr> <td colspan="4" class="content"> <pre>Just a gentle reminder guys.</pre> </td> </tr> <tr> <th> <a href="#msg228701" id="msg228701">msg228701</a> - <a href="msg228701">(view)</a></th> <th>Author: Brett Cannon (brett.cannon) <span title="Contributor form received">*</span> <img src="@@file/committer.png" title="Python committer" alt="(Python committer)" /></th> <th>Date: 2014-10-06 14:52</th> </tr> <tr> <td colspan="4" class="content"> <pre>There's actually nothing to remind here since there is no one waiting on input from anyone. Plus this particular issue is covered by <a href="http://legacy.python.org/dev/peps/pep-0473/">http://legacy.python.org/dev/peps/pep-0473/</a> .</pre> </td> </tr> </table> <table class="history table table-condensed table-striped"><tr><th colspan="4" class="header"> History </th></tr><tr> <th>Date</th> <th>User</th> <th>Action</th> <th>Args</th> </tr> <tr><td>2022-04-11 14:57:46</td><td>admin</td><td>set</td><td>github: 62365</td></tr> <tr><td>2019-04-26 17:49:52</td><td>BreamoreBoy</td><td>set</td><td>nosy: - <a rel="nofollow" href="user12545">BreamoreBoy</a><br /></td></tr> <tr><td>2014-10-06 14:52:20</td><td>brett.cannon</td><td>set</td><td>messages: + <a rel="nofollow" href="msg228701">msg228701</a></td></tr> <tr><td>2014-10-05 17:31:36</td><td>BreamoreBoy</td><td>set</td><td>nosy: + <a rel="nofollow" href="user12545">BreamoreBoy</a><br /><br />messages: + <a rel="nofollow" href="msg228593">msg228593</a><br />versions: + Python 3.5, - Python 3.4</td></tr> <tr><td>2013-06-15 21:06:07</td><td>ezio.melotti</td><td>set</td><td>nosy: + <a rel="nofollow" href="user7047">ezio.melotti</a><br /></td></tr> <tr><td>2013-06-07 21:24:11</td><td>barry</td><td>set</td><td>nosy: + <a rel="nofollow" href="user19">barry</a><br /></td></tr> <tr><td>2013-06-07 20:55:26</td><td>brett.cannon</td><td>create</td><td></td></tr> </table> </div> </div>  <div id="footer"> <div id="credits"> Supported by <a href="https://python.org/psf-landing/" title="The Python Software Foundation">The Python Software Foundation</a>, <br> Powered by <a href="http://roundup.sourceforge.net" title="Powered by the Roundup Issue Tracker">Roundup</a> </div>  Copyright © 1990-2022, <a href="http://python.org/psf">Python Software Foundation</a><br /> <a href="http://python.org/about/legal">Legal Statements</a> </div>  </div>  </div>  </body> </html>

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Issue 18165: Add 'unexpected_type' to TypeError - Python tracker