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data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle"> <path d="M3.75 2h3.5a.75.75 0 0 1 0 1.5h-3.5a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-3.5a.75.75 0 0 1 1.5 0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 12.25v-8.5C2 2.784 2.784 2 3.75 2Zm6.854-1h4.146a.25.25 0 0 1 .25.25v4.146a.25.25 0 0 1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z"></path> </svg> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{"location":"navbar","action":"executive_insights","context":"resources","tag":"link","label":"executive_insights_link_resources_navbar"}" href="https://github.com/solutions/executive-insights"> Executive Insights </a></li> </ul> </div> </div> </div> </li> <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item"> <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false"> Open Source <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1"> <path d="M12.78 5.22a.749.749 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.06 0L3.22 6.28a.749.749 0 1 1 1.06-1.06L8 8.939l3.72-3.719a.749.749 0 0 1 1.06 0Z"></path> </svg> </button> <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 pt-2 pt-lg-4 position-relative position-lg-absolute left-0 left-lg-n3 pb-2 pb-lg-4 px-lg-4"> <div class="HeaderMenu-column"> <div class="border-bottom pb-3 pb-lg-0 pb-lg-3 mb-3 mb-lg-0 mb-lg-3"> <ul class="list-style-none f5" > <li> <a 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6.94l3.22-3.22a.749.749 0 0 1 1.275.326.749.749 0 0 1-.215.734L9.06 8l3.22 3.22a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L8 9.06l-3.22 3.22a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L6.94 8 3.72 4.78a.75.75 0 0 1 0-1.06Z"></path> </svg></button> </div> </div> </div> <scrollable-region data-labelled-by="custom-scopes-dialog-title"> <div data-view-component="true" class="Overlay-body"> <div data-target="custom-scopes.customScopesModalDialogFlash"></div> <div hidden class="create-custom-scope-form" data-target="custom-scopes.createCustomScopeForm"> <!-- '"` --><!-- </textarea></xmp> --></option></form><form id="custom-scopes-dialog-form" data-turbo="false" action="/search/custom_scopes" accept-charset="UTF-8" method="post"><input type="hidden" data-csrf="true" name="authenticity_token" value="zMnzPOP+cu1dUJ9XuVD8iRhPMxm84dp4fiM46kyB+moYnz6LwE4Ay0atfjWmBtmH/9qXo7uSJMa60/e9j7/moA==" /> <div data-target="custom-scopes.customScopesModalDialogFlash"></div> <input type="hidden" 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href=\"#link-time-optimization\" id=\"user-content-id6\"\u003eLink Time Optimization\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#what-s-new\" id=\"user-content-id7\"\u003eWhat's New\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#documentation\" id=\"user-content-id8\"\u003eDocumentation\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#testing\" id=\"user-content-id9\"\u003eTesting\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#installing-multiple-versions\" id=\"user-content-id10\"\u003eInstalling multiple versions\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#release-schedule\" id=\"user-content-id11\"\u003eRelease Schedule\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"#copyright-and-license-information\" id=\"user-content-id12\"\u003eCopyright and License Information\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/div\u003e\n\u003ca 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0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eWebsite: \u003ca href=\"https://www.python.org\" rel=\"nofollow\"\u003ehttps://www.python.org\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eSource code: \u003ca href=\"https://github.com/python/cpython\"\u003ehttps://github.com/python/cpython\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eIssue tracker: \u003ca href=\"https://github.com/python/cpython/issues\"\u003ehttps://github.com/python/cpython/issues\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eDocumentation: \u003ca href=\"https://docs.python.org\" rel=\"nofollow\"\u003ehttps://docs.python.org\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eDeveloper's Guide: \u003ca href=\"https://devguide.python.org/\" rel=\"nofollow\"\u003ehttps://devguide.python.org/\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003ca name=\"user-content-contributing-to-cpython\"\u003e\u003c/a\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ca href=\"#id2\"\u003eContributing to CPython\u003c/a\u003e\u003c/h2\u003e\u003ca id=\"user-content-contributing-to-cpython\" class=\"anchor\" aria-label=\"Permalink: Contributing to CPython\" href=\"#contributing-to-cpython\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eFor more complete instructions on contributing to CPython development,\nsee the \u003ca href=\"https://devguide.python.org/\" rel=\"nofollow\"\u003eDeveloper Guide\u003c/a\u003e.\u003c/p\u003e\n\u003ca name=\"user-content-using-python\"\u003e\u003c/a\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ca href=\"#id3\"\u003eUsing Python\u003c/a\u003e\u003c/h2\u003e\u003ca id=\"user-content-using-python\" class=\"anchor\" aria-label=\"Permalink: Using Python\" href=\"#using-python\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eInstallable Python kits, and information about using Python, are available at\n\u003ca href=\"https://www.python.org/\" rel=\"nofollow\"\u003epython.org\u003c/a\u003e.\u003c/p\u003e\n\u003ca name=\"user-content-build-instructions\"\u003e\u003c/a\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ca href=\"#id4\"\u003eBuild Instructions\u003c/a\u003e\u003c/h2\u003e\u003ca id=\"user-content-build-instructions\" class=\"anchor\" aria-label=\"Permalink: Build Instructions\" href=\"#build-instructions\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eOn Unix, Linux, BSD, macOS, and Cygwin:\u003c/p\u003e\n\u003cpre\u003e./configure\nmake\nmake test\nsudo make install\n\u003c/pre\u003e\n\u003cp dir=\"auto\"\u003eThis will install Python as \u003ccode\u003epython3\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eYou can pass many options to the configure script; run \u003ccode\u003e./configure --help\u003c/code\u003e\nto find out more. On macOS case-insensitive file systems and on Cygwin,\nthe executable is called \u003ccode\u003epython.exe\u003c/code\u003e; elsewhere it's just \u003ccode\u003epython\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eBuilding a complete Python installation requires the use of various\nadditional third-party libraries, depending on your build platform and\nconfigure options. Not all standard library modules are buildable or\nusable on all platforms. Refer to the\n\u003ca href=\"https://devguide.python.org/getting-started/setup-building.html#build-dependencies\" rel=\"nofollow\"\u003eInstall dependencies\u003c/a\u003e\nsection of the \u003ca href=\"https://devguide.python.org/\" rel=\"nofollow\"\u003eDeveloper Guide\u003c/a\u003e for current detailed information on\ndependencies for various Linux distributions and macOS.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eOn macOS, there are additional configure and build options related\nto macOS framework and universal builds. Refer to \u003ca href=\"https://github.com/python/cpython/blob/main/Mac/README.rst\"\u003eMac/README.rst\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eOn Windows, see \u003ca href=\"https://github.com/python/cpython/blob/main/PCbuild/readme.txt\"\u003ePCbuild/readme.txt\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eTo build Windows installer, see \u003ca href=\"https://github.com/python/cpython/blob/main/Tools/msi/README.txt\"\u003eTools/msi/README.txt\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf you wish, you can create a subdirectory and invoke configure from there.\nFor example:\u003c/p\u003e\n\u003cpre\u003emkdir debug\ncd debug\n../configure --with-pydebug\nmake\nmake test\n\u003c/pre\u003e\n\u003cp dir=\"auto\"\u003e(This will fail if you \u003cem\u003ealso\u003c/em\u003e built at the top-level directory. You should do\na \u003ccode\u003emake clean\u003c/code\u003e at the top-level first.)\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eTo get an optimized build of Python, \u003ccode\u003econfigure --enable-optimizations\u003c/code\u003e\nbefore you run \u003ccode\u003emake\u003c/code\u003e. This sets the default make targets up to enable\nProfile Guided Optimization (PGO) and may be used to auto-enable Link Time\nOptimization (LTO) on some platforms. For more details, see the sections\nbelow.\u003c/p\u003e\n\u003ca name=\"user-content-profile-guided-optimization\"\u003e\u003c/a\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ca href=\"#id5\"\u003eProfile Guided Optimization\u003c/a\u003e\u003c/h3\u003e\u003ca id=\"user-content-profile-guided-optimization\" class=\"anchor\" aria-label=\"Permalink: Profile Guided Optimization\" href=\"#profile-guided-optimization\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003ePGO takes advantage of recent versions of the GCC or Clang compilers. If used,\neither via \u003ccode\u003econfigure --enable-optimizations\u003c/code\u003e or by manually running\n\u003ccode\u003emake profile-opt\u003c/code\u003e regardless of configure flags, the optimized build\nprocess will perform the following steps:\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe entire Python directory is cleaned of temporary files that may have\nresulted from a previous compilation.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eAn instrumented version of the interpreter is built, using suitable compiler\nflags for each flavor. Note that this is just an intermediary step. The\nbinary resulting from this step is not good for real-life workloads as it has\nprofiling instructions embedded inside.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eAfter the instrumented interpreter is built, the Makefile will run a training\nworkload. This is necessary in order to profile the interpreter's execution.\nNote also that any output, both stdout and stderr, that may appear at this step\nis suppressed.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe final step is to build the actual interpreter, using the information\ncollected from the instrumented one. The end result will be a Python binary\nthat is optimized; suitable for distribution or production installation.\u003c/p\u003e\n\u003ca name=\"user-content-link-time-optimization\"\u003e\u003c/a\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ca href=\"#id6\"\u003eLink Time Optimization\u003c/a\u003e\u003c/h3\u003e\u003ca id=\"user-content-link-time-optimization\" class=\"anchor\" aria-label=\"Permalink: Link Time Optimization\" href=\"#link-time-optimization\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eEnabled via configure's \u003ccode\u003e--with-lto\u003c/code\u003e flag. LTO takes advantage of the\nability of recent compiler toolchains to optimize across the otherwise\narbitrary \u003ccode\u003e.o\u003c/code\u003e file boundary when building final executables or shared\nlibraries for additional performance gains.\u003c/p\u003e\n\u003ca name=\"user-content-what-s-new\"\u003e\u003c/a\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ca href=\"#id7\"\u003eWhat's New\u003c/a\u003e\u003c/h2\u003e\u003ca id=\"user-content-whats-new\" class=\"anchor\" aria-label=\"Permalink: What's New\" href=\"#whats-new\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWe have a comprehensive overview of the changes in the \u003ca href=\"https://docs.python.org/3.14/whatsnew/3.14.html\" rel=\"nofollow\"\u003eWhat's New in Python\n3.14\u003c/a\u003e document. For a more\ndetailed change log, read \u003ca href=\"https://github.com/python/cpython/tree/main/Misc/NEWS.d\"\u003eMisc/NEWS\u003c/a\u003e, but a full\naccounting of changes can only be gleaned from the \u003ca href=\"https://github.com/python/cpython/commits/main\"\u003ecommit history\u003c/a\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf you want to install multiple versions of Python, see the section below\nentitled \"Installing multiple versions\".\u003c/p\u003e\n\u003ca name=\"user-content-documentation\"\u003e\u003c/a\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ca href=\"#id8\"\u003eDocumentation\u003c/a\u003e\u003c/h2\u003e\u003ca id=\"user-content-documentation\" class=\"anchor\" aria-label=\"Permalink: Documentation\" href=\"#documentation\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ca href=\"https://docs.python.org/3.14/\" rel=\"nofollow\"\u003eDocumentation for Python 3.14\u003c/a\u003e is online,\nupdated daily.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIt can also be downloaded in many formats for faster access. The documentation\nis downloadable in HTML, PDF, and reStructuredText formats; the latter version\nis primarily for documentation authors, translators, and people with special\nformatting requirements.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eFor information about building Python's documentation, refer to \u003ca href=\"https://github.com/python/cpython/blob/main/Doc/README.rst\"\u003eDoc/README.rst\u003c/a\u003e.\u003c/p\u003e\n\u003ca name=\"user-content-testing\"\u003e\u003c/a\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ca href=\"#id9\"\u003eTesting\u003c/a\u003e\u003c/h2\u003e\u003ca id=\"user-content-testing\" class=\"anchor\" aria-label=\"Permalink: Testing\" href=\"#testing\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eTo test the interpreter, type \u003ccode\u003emake test\u003c/code\u003e in the top-level directory. The\ntest set produces some output. You can generally ignore the messages about\nskipped tests due to optional features which can't be imported. If a message\nis printed about a failed test or a traceback or core dump is produced,\nsomething is wrong.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eBy default, tests are prevented from overusing resources like disk space and\nmemory. To enable these tests, run \u003ccode\u003emake buildbottest\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf any tests fail, you can re-run the failing test(s) in verbose mode. For\nexample, if \u003ccode\u003etest_os\u003c/code\u003e and \u003ccode\u003etest_gdb\u003c/code\u003e failed, you can run:\u003c/p\u003e\n\u003cpre\u003emake test TESTOPTS=\"-v test_os test_gdb\"\n\u003c/pre\u003e\n\u003cp dir=\"auto\"\u003eIf the failure persists and appears to be a problem with Python rather than\nyour environment, you can \u003ca href=\"https://github.com/python/cpython/issues\"\u003efile a bug report\u003c/a\u003e and include relevant output from\nthat command to show the issue.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eSee \u003ca href=\"https://devguide.python.org/testing/run-write-tests.html\" rel=\"nofollow\"\u003eRunning \u0026amp; Writing Tests\u003c/a\u003e\nfor more on running tests.\u003c/p\u003e\n\u003ca name=\"user-content-installing-multiple-versions\"\u003e\u003c/a\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ca href=\"#id10\"\u003eInstalling multiple versions\u003c/a\u003e\u003c/h2\u003e\u003ca id=\"user-content-installing-multiple-versions\" class=\"anchor\" aria-label=\"Permalink: Installing multiple versions\" href=\"#installing-multiple-versions\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eOn Unix and Mac systems if you intend to install multiple versions of Python\nusing the same installation prefix (\u003ccode\u003e--prefix\u003c/code\u003e argument to the configure\nscript) you must take care that your primary python executable is not\noverwritten by the installation of a different version. All files and\ndirectories installed using \u003ccode\u003emake altinstall\u003c/code\u003e contain the major and minor\nversion and can thus live side-by-side. \u003ccode\u003emake install\u003c/code\u003e also creates\n\u003ccode\u003e${prefix}/bin/python3\u003c/code\u003e which refers to \u003ccode\u003e${prefix}/bin/python3.X\u003c/code\u003e. If you\nintend to install multiple versions using the same prefix you must decide which\nversion (if any) is your \"primary\" version. Install that version using\n\u003ccode\u003emake install\u003c/code\u003e. Install all other versions using \u003ccode\u003emake altinstall\u003c/code\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eFor example, if you want to install Python 2.7, 3.6, and 3.14 with 3.14 being the\nprimary version, you would execute \u003ccode\u003emake install\u003c/code\u003e in your 3.14 build directory\nand \u003ccode\u003emake altinstall\u003c/code\u003e in the others.\u003c/p\u003e\n\u003ca name=\"user-content-release-schedule\"\u003e\u003c/a\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ca href=\"#id11\"\u003eRelease Schedule\u003c/a\u003e\u003c/h2\u003e\u003ca id=\"user-content-release-schedule\" class=\"anchor\" aria-label=\"Permalink: Release Schedule\" href=\"#release-schedule\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eSee \u003ca href=\"https://peps.python.org/pep-0745/\" rel=\"nofollow\"\u003ePEP 745\u003c/a\u003e for Python 3.14 release details.\u003c/p\u003e\n\u003ca name=\"user-content-copyright-and-license-information\"\u003e\u003c/a\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e\u003ca href=\"#id12\"\u003eCopyright and License Information\u003c/a\u003e\u003c/h2\u003e\u003ca id=\"user-content-copyright-and-license-information\" class=\"anchor\" aria-label=\"Permalink: Copyright and License Information\" href=\"#copyright-and-license-information\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eCopyright © 2001 Python Software Foundation. All rights reserved.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eCopyright © 2000 BeOpen.com. All rights reserved.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eCopyright © 1995-2001 Corporation for National Research Initiatives. All\nrights reserved.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eCopyright © 1991-1995 Stichting Mathematisch Centrum. All rights reserved.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eSee the \u003ca href=\"https://github.com/python/cpython/blob/main/LICENSE\"\u003eLICENSE\u003c/a\u003e for\ninformation on the history of this software, terms \u0026amp; conditions for usage, and a\nDISCLAIMER OF ALL WARRANTIES.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThis Python distribution contains \u003cem\u003eno\u003c/em\u003e GNU General Public License (GPL) code,\nso it may be used in proprietary projects. There are interfaces to some GNU\ncode but these are entirely optional.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eAll trademarks referenced herein are property of their respective holders.\u003c/p\u003e\n\n\u003c/article\u003e","loaded":true,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"This is Python version 3.14.0 alpha 6","anchor":"this-is-python-version-3140-alpha-6","htmlText":"This is Python version 3.14.0 alpha 6"},{"level":2,"text":"General Information","anchor":"general-information","htmlText":"General Information"},{"level":2,"text":"Contributing to CPython","anchor":"contributing-to-cpython","htmlText":"Contributing to CPython"},{"level":2,"text":"Using Python","anchor":"using-python","htmlText":"Using Python"},{"level":2,"text":"Build Instructions","anchor":"build-instructions","htmlText":"Build Instructions"},{"level":3,"text":"Profile Guided Optimization","anchor":"profile-guided-optimization","htmlText":"Profile Guided Optimization"},{"level":3,"text":"Link Time Optimization","anchor":"link-time-optimization","htmlText":"Link Time Optimization"},{"level":2,"text":"What's New","anchor":"whats-new","htmlText":"What's New"},{"level":2,"text":"Documentation","anchor":"documentation","htmlText":"Documentation"},{"level":2,"text":"Testing","anchor":"testing","htmlText":"Testing"},{"level":2,"text":"Installing multiple versions","anchor":"installing-multiple-versions","htmlText":"Installing multiple versions"},{"level":2,"text":"Release Schedule","anchor":"release-schedule","htmlText":"Release Schedule"},{"level":2,"text":"Copyright and License Information","anchor":"copyright-and-license-information","htmlText":"Copyright and License Information"}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fpython%2Fcpython"}},{"displayName":"CODE_OF_CONDUCT.md","repoName":".github","refName":"master","path":"CODE_OF_CONDUCT.md","preferredFileType":"code_of_conduct","tabName":"Code of 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This is Python version 3.14.0 alpha 6" href="#this-is-python-version-3140-alpha-6"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <a href="https://github.com/python/cpython/actions"><img alt="CPython build status on GitHub Actions" src="https://github.com/python/cpython/actions/workflows/build.yml/badge.svg?branch=main&event=push" style="max-width: 100%;"></a> <a 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style="max-width: 100%;"> </a> <p dir="auto">Copyright © 2001 Python Software Foundation. All rights reserved.</p> <p dir="auto">See the end of this file for further copyright and license information.</p> <div id="user-content-contents" dir="auto"> <p dir="auto">Contents</p> <ul dir="auto"> <li><a href="#general-information" id="user-content-id1">General Information</a></li> <li><a href="#contributing-to-cpython" id="user-content-id2">Contributing to CPython</a></li> <li><a href="#using-python" id="user-content-id3">Using Python</a></li> <li><a href="#build-instructions" id="user-content-id4">Build Instructions</a><ul dir="auto"> <li><a href="#profile-guided-optimization" id="user-content-id5">Profile Guided Optimization</a></li> <li><a href="#link-time-optimization" id="user-content-id6">Link Time Optimization</a></li> </ul> </li> <li><a href="#what-s-new" id="user-content-id7">What's New</a></li> <li><a href="#documentation" id="user-content-id8">Documentation</a></li> <li><a href="#testing" id="user-content-id9">Testing</a></li> <li><a href="#installing-multiple-versions" id="user-content-id10">Installing multiple versions</a></li> <li><a href="#release-schedule" id="user-content-id11">Release Schedule</a></li> <li><a href="#copyright-and-license-information" id="user-content-id12">Copyright and License Information</a></li> </ul> </div> <a name="user-content-general-information"></a> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto"><a href="#id1">General Information</a></h2><a id="user-content-general-information" class="anchor" aria-label="Permalink: General Information" href="#general-information"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li>Website: <a href="https://www.python.org" rel="nofollow">https://www.python.org</a></li> <li>Source code: <a href="https://github.com/python/cpython">https://github.com/python/cpython</a></li> <li>Issue tracker: <a href="https://github.com/python/cpython/issues">https://github.com/python/cpython/issues</a></li> <li>Documentation: <a href="https://docs.python.org" rel="nofollow">https://docs.python.org</a></li> <li>Developer's Guide: <a href="https://devguide.python.org/" rel="nofollow">https://devguide.python.org/</a></li> </ul> <a name="user-content-contributing-to-cpython"></a> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto"><a href="#id2">Contributing to CPython</a></h2><a id="user-content-contributing-to-cpython" class="anchor" aria-label="Permalink: Contributing to CPython" href="#contributing-to-cpython"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">For more complete instructions on contributing to CPython development, see the <a href="https://devguide.python.org/" rel="nofollow">Developer Guide</a>.</p> <a name="user-content-using-python"></a> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto"><a href="#id3">Using Python</a></h2><a id="user-content-using-python" class="anchor" aria-label="Permalink: Using Python" href="#using-python"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Installable Python kits, and information about using Python, are available at <a href="https://www.python.org/" rel="nofollow">python.org</a>.</p> <a name="user-content-build-instructions"></a> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto"><a href="#id4">Build Instructions</a></h2><a id="user-content-build-instructions" class="anchor" aria-label="Permalink: Build Instructions" href="#build-instructions"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">On Unix, Linux, BSD, macOS, and Cygwin:</p> <pre>./configure make make test sudo make install </pre> <p dir="auto">This will install Python as <code>python3</code>.</p> <p dir="auto">You can pass many options to the configure script; run <code>./configure --help</code> to find out more. On macOS case-insensitive file systems and on Cygwin, the executable is called <code>python.exe</code>; elsewhere it's just <code>python</code>.</p> <p dir="auto">Building a complete Python installation requires the use of various additional third-party libraries, depending on your build platform and configure options. Not all standard library modules are buildable or usable on all platforms. Refer to the <a href="https://devguide.python.org/getting-started/setup-building.html#build-dependencies" rel="nofollow">Install dependencies</a> section of the <a href="https://devguide.python.org/" rel="nofollow">Developer Guide</a> for current detailed information on dependencies for various Linux distributions and macOS.</p> <p dir="auto">On macOS, there are additional configure and build options related to macOS framework and universal builds. Refer to <a href="https://github.com/python/cpython/blob/main/Mac/README.rst">Mac/README.rst</a>.</p> <p dir="auto">On Windows, see <a href="https://github.com/python/cpython/blob/main/PCbuild/readme.txt">PCbuild/readme.txt</a>.</p> <p dir="auto">To build Windows installer, see <a href="https://github.com/python/cpython/blob/main/Tools/msi/README.txt">Tools/msi/README.txt</a>.</p> <p dir="auto">If you wish, you can create a subdirectory and invoke configure from there. For example:</p> <pre>mkdir debug cd debug ../configure --with-pydebug make make test </pre> <p dir="auto">(This will fail if you <em>also</em> built at the top-level directory. You should do a <code>make clean</code> at the top-level first.)</p> <p dir="auto">To get an optimized build of Python, <code>configure --enable-optimizations</code> before you run <code>make</code>. This sets the default make targets up to enable Profile Guided Optimization (PGO) and may be used to auto-enable Link Time Optimization (LTO) on some platforms. For more details, see the sections below.</p> <a name="user-content-profile-guided-optimization"></a> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto"><a href="#id5">Profile Guided Optimization</a></h3><a id="user-content-profile-guided-optimization" class="anchor" aria-label="Permalink: Profile Guided Optimization" href="#profile-guided-optimization"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">PGO takes advantage of recent versions of the GCC or Clang compilers. If used, either via <code>configure --enable-optimizations</code> or by manually running <code>make profile-opt</code> regardless of configure flags, the optimized build process will perform the following steps:</p> <p dir="auto">The entire Python directory is cleaned of temporary files that may have resulted from a previous compilation.</p> <p dir="auto">An instrumented version of the interpreter is built, using suitable compiler flags for each flavor. Note that this is just an intermediary step. The binary resulting from this step is not good for real-life workloads as it has profiling instructions embedded inside.</p> <p dir="auto">After the instrumented interpreter is built, the Makefile will run a training workload. This is necessary in order to profile the interpreter's execution. Note also that any output, both stdout and stderr, that may appear at this step is suppressed.</p> <p dir="auto">The final step is to build the actual interpreter, using the information collected from the instrumented one. The end result will be a Python binary that is optimized; suitable for distribution or production installation.</p> <a name="user-content-link-time-optimization"></a> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto"><a href="#id6">Link Time Optimization</a></h3><a id="user-content-link-time-optimization" class="anchor" aria-label="Permalink: Link Time Optimization" href="#link-time-optimization"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Enabled via configure's <code>--with-lto</code> flag. LTO takes advantage of the ability of recent compiler toolchains to optimize across the otherwise arbitrary <code>.o</code> file boundary when building final executables or shared libraries for additional performance gains.</p> <a name="user-content-what-s-new"></a> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto"><a href="#id7">What's New</a></h2><a id="user-content-whats-new" class="anchor" aria-label="Permalink: What's New" href="#whats-new"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">We have a comprehensive overview of the changes in the <a href="https://docs.python.org/3.14/whatsnew/3.14.html" rel="nofollow">What's New in Python 3.14</a> document. For a more detailed change log, read <a href="https://github.com/python/cpython/tree/main/Misc/NEWS.d">Misc/NEWS</a>, but a full accounting of changes can only be gleaned from the <a href="https://github.com/python/cpython/commits/main">commit history</a>.</p> <p dir="auto">If you want to install multiple versions of Python, see the section below entitled "Installing multiple versions".</p> <a name="user-content-documentation"></a> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto"><a href="#id8">Documentation</a></h2><a id="user-content-documentation" class="anchor" aria-label="Permalink: Documentation" href="#documentation"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><a href="https://docs.python.org/3.14/" rel="nofollow">Documentation for Python 3.14</a> is online, updated daily.</p> <p dir="auto">It can also be downloaded in many formats for faster access. The documentation is downloadable in HTML, PDF, and reStructuredText formats; the latter version is primarily for documentation authors, translators, and people with special formatting requirements.</p> <p dir="auto">For information about building Python's documentation, refer to <a href="https://github.com/python/cpython/blob/main/Doc/README.rst">Doc/README.rst</a>.</p> <a name="user-content-testing"></a> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto"><a href="#id9">Testing</a></h2><a id="user-content-testing" class="anchor" aria-label="Permalink: Testing" href="#testing"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">To test the interpreter, type <code>make test</code> in the top-level directory. The test set produces some output. You can generally ignore the messages about skipped tests due to optional features which can't be imported. If a message is printed about a failed test or a traceback or core dump is produced, something is wrong.</p> <p dir="auto">By default, tests are prevented from overusing resources like disk space and memory. To enable these tests, run <code>make buildbottest</code>.</p> <p dir="auto">If any tests fail, you can re-run the failing test(s) in verbose mode. For example, if <code>test_os</code> and <code>test_gdb</code> failed, you can run:</p> <pre>make test TESTOPTS="-v test_os test_gdb" </pre> <p dir="auto">If the failure persists and appears to be a problem with Python rather than your environment, you can <a href="https://github.com/python/cpython/issues">file a bug report</a> and include relevant output from that command to show the issue.</p> <p dir="auto">See <a href="https://devguide.python.org/testing/run-write-tests.html" rel="nofollow">Running & Writing Tests</a> for more on running tests.</p> <a name="user-content-installing-multiple-versions"></a> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto"><a href="#id10">Installing multiple versions</a></h2><a id="user-content-installing-multiple-versions" class="anchor" aria-label="Permalink: Installing multiple versions" href="#installing-multiple-versions"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">On Unix and Mac systems if you intend to install multiple versions of Python using the same installation prefix (<code>--prefix</code> argument to the configure script) you must take care that your primary python executable is not overwritten by the installation of a different version. All files and directories installed using <code>make altinstall</code> contain the major and minor version and can thus live side-by-side. <code>make install</code> also creates <code>${prefix}/bin/python3</code> which refers to <code>${prefix}/bin/python3.X</code>. If you intend to install multiple versions using the same prefix you must decide which version (if any) is your "primary" version. Install that version using <code>make install</code>. Install all other versions using <code>make altinstall</code>.</p> <p dir="auto">For example, if you want to install Python 2.7, 3.6, and 3.14 with 3.14 being the primary version, you would execute <code>make install</code> in your 3.14 build directory and <code>make altinstall</code> in the others.</p> <a name="user-content-release-schedule"></a> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto"><a href="#id11">Release Schedule</a></h2><a id="user-content-release-schedule" class="anchor" aria-label="Permalink: Release Schedule" href="#release-schedule"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">See <a href="https://peps.python.org/pep-0745/" rel="nofollow">PEP 745</a> for Python 3.14 release details.</p> <a name="user-content-copyright-and-license-information"></a> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto"><a href="#id12">Copyright and License Information</a></h2><a id="user-content-copyright-and-license-information" class="anchor" aria-label="Permalink: Copyright and License Information" href="#copyright-and-license-information"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Copyright © 2001 Python Software Foundation. All rights reserved.</p> <p dir="auto">Copyright © 2000 BeOpen.com. All rights reserved.</p> <p dir="auto">Copyright © 1995-2001 Corporation for National Research Initiatives. All rights reserved.</p> <p dir="auto">Copyright © 1991-1995 Stichting Mathematisch Centrum. All rights reserved.</p> <p dir="auto">See the <a href="https://github.com/python/cpython/blob/main/LICENSE">LICENSE</a> for information on the history of this software, terms & conditions for usage, and a DISCLAIMER OF ALL WARRANTIES.</p> <p dir="auto">This Python distribution contains <em>no</em> GNU General Public License (GPL) code, so it may be used in proprietary projects. There are interfaces to some GNU code but these are entirely optional.</p> <p dir="auto">All trademarks referenced herein are property of their respective holders.</p> </article></div></div></div></div></div> <!-- --> <!-- --> <script type="application/json" id="__PRIMER_DATA_:R0:__">{"resolvedServerColorMode":"day"}</script></div> </react-partial> <input type="hidden" data-csrf="true" value="yWEgs2BdB35iVBdayPdbY00qg49XB1upga71z52uIFNv792cVzWNbFfqIx+oOpB4K8AmSnh3TiU23JTHSlJeHQ==" /> </div> <div data-view-component="true" class="Layout-sidebar"> <div class="BorderGrid about-margin" data-pjax> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <div class="hide-sm hide-md"> <h2 class="mb-3 h4">About</h2> <p class="f4 my-3"> The Python programming language </p> <div class="my-3 d-flex flex-items-center"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link flex-shrink-0 mr-2"> <path d="m7.775 3.275 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