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href="#svg-sun"></use></svg> </button> </div> <label class="toc-overlay-icon toc-content-icon" for="__toc"> <div class="visually-hidden">Toggle table of contents sidebar</div> <i class="icon"><svg><use href="#svg-toc"></use></svg></i> </label> </div> <article role="main" id="furo-main-content"> <section id="caching"> <h1>Caching<a class="headerlink" href="#caching" title="Link to this heading">¶</a></h1> <div class="versionadded"> <p><span class="versionmodified added">Added in version 6.0.</span></p> </div> <p>pip provides an on-by-default caching, designed to reduce the amount of time spent on duplicate downloads and builds.</p> <section id="what-is-cached"> <h2>What is cached<a class="headerlink" href="#what-is-cached" title="Link to this heading">¶</a></h2> <section id="http-responses"> <h3>HTTP responses<a class="headerlink" href="#http-responses" title="Link to this heading">¶</a></h3> <p>This cache functions like a web browser cache.</p> <p>When making any HTTP request, pip will first check its local cache to determine if it has a suitable response stored for that request which has not expired. If it does then it returns that response and doesn’t re-download the content.</p> <p>If it has a response stored but it has expired, then it will attempt to make a conditional request to refresh the cache which will either return an empty response telling pip to simply use the cached item (and refresh the expiration timer) or it will return a whole new response which pip can then store in the cache.</p> <p>While this cache attempts to minimize network activity, it does not prevent network access altogether. If you want a local install solution that circumvents accessing PyPI, see <a class="reference internal" href="../user_guide.html#installing-from-local-packages"><span class="std std-ref">Installing from local packages</span></a>.</p> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 23.3: </span>A new cache format is now used, stored in a directory called <code class="docutils literal notranslate"><span class="pre">http-v2</span></code> (see below for this directory’s location). Previously this cache was stored in a directory called <code class="docutils literal notranslate"><span class="pre">http</span></code> in the main cache directory. If you have completely switched to newer versions of <code class="docutils literal notranslate"><span class="pre">pip</span></code>, you may wish to delete the old directory.</p> </div> </section> <section id="locally-built-wheels"> <span id="wheel-caching"></span><h3>Locally built wheels<a class="headerlink" href="#locally-built-wheels" title="Link to this heading">¶</a></h3> <p>pip attempts to use wheels from its local wheel cache whenever possible.</p> <p>This means that if there is a cached wheel for the same version of a specific package name, pip will use that wheel instead of rebuilding the project.</p> <p>When no wheels are found for a source distribution, pip will attempt to build a wheel using the package’s build system. If the build is successful, this wheel is added to the cache and used in subsequent installs for the same package version.</p> <p>Wheels built from source distributions provided to pip as a direct path (such as <code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">install</span> <span class="pre">.</span></code>) are not cached across runs, though they may be reused within the same <code class="docutils literal notranslate"><span class="pre">pip</span></code> execution.</p> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 20.0: </span>pip now caches wheels when building from an immutable Git reference (i.e. a commit hash).</p> </div> </section> </section> <section id="where-is-the-cache-stored"> <h2>Where is the cache stored<a class="headerlink" href="#where-is-the-cache-stored" title="Link to this heading">¶</a></h2> <div class="admonition caution"> <p class="admonition-title">Caution</p> <p>The exact filesystem structure of pip’s cache’s contents is considered to be an implementation detail and may change between any two versions of pip.</p> </div> <section id="pip-cache-dir"> <h3><code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">cache</span> <span class="pre">dir</span></code><a class="headerlink" href="#pip-cache-dir" title="Link to this heading">¶</a></h3> <div class="versionadded"> <p><span class="versionmodified added">Added in version 20.1.</span></p> </div> <p>You can use <code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">cache</span> <span class="pre">dir</span></code> to get the cache directory that pip is currently configured to use.</p> </section> <section id="default-paths"> <h3>Default paths<a class="headerlink" href="#default-paths" title="Link to this heading">¶</a></h3> <div class="tab-set docutils"> <input checked="True" class="tab-input" id="tab-set--0-input--1" name="tab-set--0" type="radio"><label class="tab-label" for="tab-set--0-input--1">Linux</label><div class="tab-content docutils"> <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">~/.</span><span class="n">cache</span><span class="o">/</span><span class="n">pip</span> </pre></div> </div> <p>pip will also respect <code class="docutils literal notranslate"><span class="pre">XDG_CACHE_HOME</span></code>.</p> </div> <input class="tab-input" id="tab-set--0-input--2" name="tab-set--0" type="radio"><label class="tab-label" for="tab-set--0-input--2">MacOS</label><div class="tab-content docutils"> <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">~/</span><span class="n">Library</span><span class="o">/</span><span class="n">Caches</span><span class="o">/</span><span class="n">pip</span> </pre></div> </div> </div> <input class="tab-input" id="tab-set--0-input--3" name="tab-set--0" type="radio"><label class="tab-label" for="tab-set--0-input--3">Windows</label><div class="tab-content docutils"> <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">%</span><span class="n">LocalAppData</span><span class="o">%</span>\<span class="n">pip</span>\<span class="n">Cache</span> </pre></div> </div> </div> </div> </section> </section> <section id="avoiding-caching"> <h2>Avoiding caching<a class="headerlink" href="#avoiding-caching" title="Link to this heading">¶</a></h2> <p>pip tries to use its cache whenever possible, and it is designed do the right thing by default.</p> <p>In some cases, pip’s caching behaviour can be undesirable. As an example, if you have package with optional C extensions, that generates a pure Python wheel when the C extension can’t be built, pip will use that cached wheel even when you later invoke it from an environment that could have built those optional C extensions. This is because pip is seeing a cached wheel that matches the package being built, and pip assumes that the result of building a package from a package index is deterministic.</p> <p>The recommended approach for dealing with these situations is to directly install from a source distribution instead of letting pip auto-discover the package when it is trying to install. Installing directly from a source distribution will make pip build a wheel, regardless of whether there is a matching cached wheel. This usually means doing something like:</p> <p><div class="tab-set docutils"> <input checked="True" class="tab-input" id="tab-set--1-input--1" name="tab-set--1" type="radio"><label class="tab-label" for="tab-set--1-input--1">Linux</label><div class="tab-content docutils"> <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>pip<span class="w"> </span>download<span class="w"> </span><span class="nv">sampleproject</span><span class="o">==</span><span class="m">1</span>.0.0<span class="w"> </span>--no-binary<span class="w"> </span>:all: <span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>pip<span class="w"> </span>install<span class="w"> </span>sampleproject-1.0.0.tar.gz </pre></div> </div> </div> <input class="tab-input" id="tab-set--1-input--2" name="tab-set--1" type="radio"><label class="tab-label" for="tab-set--1-input--2">MacOS</label><div class="tab-content docutils"> <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>pip<span class="w"> </span>download<span class="w"> </span><span class="nv">sampleproject</span><span class="o">==</span><span class="m">1</span>.0.0<span class="w"> </span>--no-binary<span class="w"> </span>:all: <span class="gp">$ </span>python<span class="w"> </span>-m<span class="w"> </span>pip<span class="w"> </span>install<span class="w"> </span>sampleproject-1.0.0.tar.gz </pre></div> </div> </div> <input class="tab-input" id="tab-set--1-input--3" name="tab-set--1" type="radio"><label class="tab-label" for="tab-set--1-input--3">Windows</label><div class="tab-content docutils"> <div class="highlight-doscon notranslate"><div class="highlight"><pre><span></span><span class="gp">C:></span> py -m pip download sampleproject==1.0.0 --no-binary :all: <span class="gp">C:></span> py -m pip install sampleproject-1.0.0.tar.gz </pre></div> </div> </div> </div> </p> <p>It is also a good idea to remove the offending cached wheel using the <a class="reference internal" href="../cli/pip_cache.html#pip-cache"><span class="std std-ref">pip cache</span></a> command.</p> </section> <section id="cache-management"> <h2>Cache management<a class="headerlink" href="#cache-management" title="Link to this heading">¶</a></h2> <p>The <a class="reference internal" href="../cli/pip_cache.html#pip-cache"><span class="std std-ref">pip cache</span></a> command can be used to manage pip’s cache.</p> <section id="general-overview"> <h3>General overview<a class="headerlink" href="#general-overview" title="Link to this heading">¶</a></h3> <p><code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">cache</span> <span class="pre">info</span></code> provides an overview of the contents of pip’s cache, such as the total size and location of various parts of it.</p> </section> <section id="removing-a-single-package"> <h3>Removing a single package<a class="headerlink" href="#removing-a-single-package" title="Link to this heading">¶</a></h3> <p><code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">cache</span> <span class="pre">remove</span> <span class="pre">setuptools</span></code> removes all wheel files related to setuptools from pip’s cache. HTTP cache files are not removed at this time.</p> </section> <section id="removing-the-cache"> <h3>Removing the cache<a class="headerlink" href="#removing-the-cache" title="Link to this heading">¶</a></h3> <p><code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">cache</span> <span class="pre">purge</span></code> will clear all files from pip’s wheel and HTTP caches.</p> </section> <section id="listing-cached-files"> <h3>Listing cached files<a class="headerlink" href="#listing-cached-files" title="Link to this heading">¶</a></h3> <p><code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">cache</span> <span class="pre">list</span></code> will list all wheel files from pip’s cache.</p> <p><code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">cache</span> <span class="pre">list</span> <span class="pre">setuptools</span></code> will list all setuptools-related wheel files from pip’s cache.</p> </section> </section> <section id="disabling-caching"> <h2>Disabling caching<a class="headerlink" href="#disabling-caching" title="Link to this heading">¶</a></h2> <p>pip’s caching behaviour is disabled by passing the <code class="docutils literal notranslate"><span class="pre">--no-cache-dir</span></code> option.</p> <p>It is, however, recommended to <strong>NOT</strong> disable pip’s caching unless you have caching at a higher level (eg: layered caches in container builds). Doing so can significantly slow down pip (due to repeated operations and package builds) and result in significantly more network usage.</p> </section> </section> </article> </div> <footer> <div class="related-pages"> <a class="next-page" href="configuration.html"> <div class="page-info"> <div class="context"> <span>Next</span> </div> <div class="title">Configuration</div> </div> <svg class="furo-related-icon"><use href="#svg-arrow-right"></use></svg> </a> <a class="prev-page" href="authentication.html"> <svg class="furo-related-icon"><use href="#svg-arrow-right"></use></svg> <div class="page-info"> <div class="context"> <span>Previous</span> </div> <div class="title">Authentication</div> </div> </a> </div> <div class="bottom-of-page"> <div class="left-details"> <div class="copyright"> <a href="../copyright.html">Copyright</a> © The pip developers </div> Made with <a href="https://www.sphinx-doc.org/">Sphinx</a> and <a class="muted-link" href="https://pradyunsg.me">@pradyunsg</a>'s <a href="https://github.com/pradyunsg/furo">Furo</a> </div> <div class="right-details"> </div> </div> </footer> </div> <aside class="toc-drawer"> <div class="toc-sticky toc-scroll"> <div class="toc-title-container"> <span class="toc-title"> On this page </span> </div> <div class="toc-tree-container"> <div class="toc-tree"> <ul> <li><a class="reference internal" href="#">Caching</a><ul> <li><a class="reference internal" href="#what-is-cached">What is cached</a><ul> <li><a class="reference internal" href="#http-responses">HTTP responses</a></li> <li><a class="reference internal" href="#locally-built-wheels">Locally built wheels</a></li> </ul> </li> <li><a class="reference internal" href="#where-is-the-cache-stored">Where is the cache stored</a><ul> <li><a class="reference internal" href="#pip-cache-dir"><code class="docutils literal notranslate"><span class="pre">pip</span> <span class="pre">cache</span> <span class="pre">dir</span></code></a></li> <li><a class="reference internal" href="#default-paths">Default paths</a></li> </ul> </li> <li><a class="reference internal" href="#avoiding-caching">Avoiding caching</a></li> <li><a class="reference internal" href="#cache-management">Cache management</a><ul> <li><a class="reference internal" href="#general-overview">General overview</a></li> <li><a class="reference internal" href="#removing-a-single-package">Removing a single package</a></li> <li><a class="reference internal" href="#removing-the-cache">Removing the cache</a></li> <li><a class="reference internal" href="#listing-cached-files">Listing cached files</a></li> </ul> </li> <li><a class="reference internal" href="#disabling-caching">Disabling caching</a></li> </ul> </li> </ul> </div> </div> </div> </aside> </div> </div><script src="../_static/documentation_options.js?v=22103397"></script> <script src="../_static/doctools.js?v=9bcbadda"></script> <script src="../_static/sphinx_highlight.js?v=dc90522c"></script> <script type="module" src="../_static/scripts/furo.js?v=d32f1409"></script> <script src="../_static/clipboard.min.js?v=66b4909c"></script> <script src="../_static/copybutton.js?v=80126f2a"></script> <script src="../_static/tabs.js?v=3ee01567"></script> </body> </html>