Calling Shell Commands from Python: OS.system vs Subprocess

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class="sc-1b50eb50-0 BvPFd"><div class="metaContainer desktop-no-show"><div class="sc-1b50eb50-4 eWjCiv"><div class="sc-1b50eb50-3 efGOhs"><span class="stat"><i aria-hidden="true" class="fas fa-star"/> 22,591 reads</span></div></div></div><h1 class="story-title" style="text-align:left">Calling Shell Commands from Python: OS.system vs Subprocess</h1><div style="margin-bottom:20px"><div class="sc-1b50eb50-4 eWjCiv"><div class="sc-1b50eb50-3 efGOhs"><a href="/archives/2020/11/17">November 17th 2020</a><hr class="vertical"/><span class="readingTime">6m</span><hr class="vertical "/><span class="header-handle " data-tip="true" data-for="story-author" aria-label="bookmark story" data-delay-hide="1000"><span> by </span><a> @marcosdelcueto </a></span><span class="stat mobile-no-show"><i aria-hidden="true" class="fas fa-star"/> 22,591 reads</span><button data-tip="Bookmark story" aria-label="bookmark story" data-for="U2CG1GD2RERZHpJeRi6s" data-html="true" data-delay-hide="1000" 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In this short article, I discuss how to use the older (although still relatively common) os.system command and the newer subprocess command. I will show some of their potential risks, limitations and provide complete examples of their use. For example, the code below would be equivalent to the previouse code below. The article also provides examples of the use of these commands.<hr style="width:100%"/><div class="mentions-container"><div><h3>People Mentioned</h3><div><div class="sc-1b50eb50-5 kyVEHO"><a href="/u/anthony.p.shaw" style="text-decoration:none;text-align:left" target="_blank" rel="noopener noreferrer"><div class="img"><span style="box-sizing:border-box;display:inline-block;overflow:hidden;width:initial;height:initial;background:none;opacity:1;border:0;margin:0;padding:0;position:relative;max-width:100%"><span style="box-sizing:border-box;display:block;width:initial;height:initial;background:none;opacity:1;border:0;margin:0;padding:0;max-width:100%"><img style="display:block;max-width:100%;width:initial;height:initial;background:none;opacity:1;border:0;margin:0;padding:0" alt="" aria-hidden="true" src="data:image/svg+xml,%3csvg%20xmlns=%27http://www.w3.org/2000/svg%27%20version=%271.1%27%20width=%2770%27%20height=%2770%27/%3e"/></span><img data-tip="true" 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style="top:0;left:0;bottom:0;right:0;box-sizing:border-box;padding:0;border:none;margin:auto;display:block;width:0;height:0;min-width:100%;max-width:100%;min-height:100%;max-height:100%;object-fit:cover" loading="lazy"/></noscript></span></a></div><div class="author-info"><span>by Marcos del Cueto <span class="handle"><a href="/u/marcosdelcueto">@marcosdelcueto</a>.</span></span><span class="bio">PhD in Theoretical Chemistry. Interested in Machine Learning applied to materials discovery</span></div></div><a class="bio-cta" href="https://www.mdelcueto.com/blog?ref=hackernoon.com" rel="ugc"><i class="far fa-server" style="font-size:1.8rem"/>Visit my science and programming blog</a></div></footer><div id="commentSection"/><div class="adbytag"><div style="background-color:#009300" class="sc-98ff0015-0 bOglgE"><a href="https://www.pynt.io/?utm_source=mediabuying&amp;utm_medium=banner&amp;utm_campaign=hackernoon_ad_by_tagged_pages" target="_blank"><div class="info"><div style="height:100px;width:100px;position:relative"><span style="box-sizing:border-box;display:block;overflow:hidden;width:initial;height:initial;background:none;opacity:1;border:0;margin:0;padding:0;top:0;left:0;bottom:0;right:0"><img alt="Pynt" src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" decoding="async" data-nimg="fill" 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