https://steadymonkey.eu/tags/python/Recent content in Python on Steady MonkeyHugoen-gbSun, 05 Jan 2020 18:43:10 +0000https://steadymonkey.eu/blog/a-reentrant-context-manager-in-python/Sun, 05 Jan 2020 18:43:10 +0000https://steadymonkey.eu/blog/a-reentrant-context-manager-in-python/<p>A Python context manager caters for the boilerplate wrapping a resource to offer safety and convenient (re-)use. This protocol ensures that once the context is initialised, it will be torn down whatever happens. Examples of resource handling are input/output operations, session management, thread locking, etc. In this article, we will take a focus peek at one &ldquo;<a href="https://www.python.org/dev/peps/pep-0020/#the-zen-of-python">honking great idea</a> <a href="https://web.archive.org/web/20191225084248/https://www.python.org/dev/peps/pep-0020/#the-zen-of-python" title="2019-12-25 archived copy of https://www.python.org/dev/peps/pep-0020/#the-zen-of-python" class="archive-link" target="_blank">(archived)</a> &rdquo;: a <strong>reentrant context manager</strong>.</p> <p>There has been <a href="http://johnj.com/intro-to-context-managers-in-python.html">many</a> <a href="https://book.pythontips.com/en/latest/context_managers.html">articles</a> <a href="https://web.archive.org/web/20191228102745/https://book.pythontips.com/en/latest/context_managers.html" title="2019-12-28 archived copy of https://book.pythontips.com/en/latest/context_managers.html" class="archive-link" target="_blank">(archived)</a> and pages of <a href="https://en.wikibooks.org/wiki/Python_Programming/Context_Managers">documentation</a> <a href="https://web.archive.org/web/20191031175507/https://en.wikibooks.org/wiki/Python_Programming/Context_Managers" title="2019-10-31 archived copy of https://en.wikibooks.org/wiki/Python_Programming/Context_Managers" class="archive-link" target="_blank">(archived)</a> to explain why context managers are a good thing, and why you would want to <a href="https://jeffknupp.com/blog/2016/03/07/python-with-context-managers/">always handle your resources</a> <a href="https://web.archive.org/web/20190917131000/https://jeffknupp.com/blog/2016/03/07/python-with-context-managers/" title="2019-09-17 archived copy of https://jeffknupp.com/blog/2016/03/07/python-with-context-managers/" class="archive-link" target="_blank">(archived)</a> with them.</p>