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        <li><a href="library/asyncio-dev.html#index-2">PYTHONASYNCIODEBUG</a>, <a href="library/asyncio-eventloop.html#index-17">[1]</a>, <a href="library/devmode.html#index-17">[2]</a>, <a href="using/cmdline.html#envvar-PYTHONASYNCIODEBUG">[3]</a>
</li>
        <li><a href="library/functions.html#index-21">PYTHONBREAKPOINT</a>, <a href="library/sys.html#index-3">[1]</a>, <a href="library/sys.html#index-4">[2]</a>, <a href="library/sys.html#index-5">[3]</a>, <a href="using/cmdline.html#envvar-PYTHONBREAKPOINT">[4]</a>, <a href="whatsnew/3.7.html#index-12">[5]</a>
</li>
        <li><a href="library/functions.html#index-18">PYTHONCASEOK</a>, <a href="using/cmdline.html#envvar-PYTHONCASEOK">[1]</a>, <a href="whatsnew/2.1.html#index-11">[2]</a>, <a href="whatsnew/3.9.html#index-21">[3]</a>, <a href="whatsnew/changelog.html#index-273">[4]</a>
</li>
        <li><a href="c-api/init_config.html#index-41">PYTHONCOERCECLOCALE</a>, <a href="library/os.html#index-4">[1]</a>, <a href="using/cmdline.html#envvar-PYTHONCOERCECLOCALE">[2]</a>, <a href="using/configure.html#index-37">[3]</a>, <a href="whatsnew/3.7.html#index-4">[4]</a>
</li>
        <li><a href="c-api/init.html#index-60">PYTHONDEBUG</a>, <a href="c-api/init_config.html#index-25">[1]</a>, <a href="using/cmdline.html#envvar-PYTHONDEBUG">[2]</a>, <a href="using/cmdline.html#index-2">[3]</a>, <a href="using/configure.html#index-8">[4]</a>
</li>
        <li><a href="c-api/init_config.html#index-9">PYTHONDEVMODE</a>, <a href="library/devmode.html#index-12">[1]</a>, <a href="using/cmdline.html#envvar-PYTHONDEVMODE">[2]</a>, <a href="using/cmdline.html#index-24">[3]</a>, <a href="whatsnew/3.7.html#index-27">[4]</a>
</li>
        <li><a href="c-api/init.html#index-61">PYTHONDONTWRITEBYTECODE</a>, <a href="c-api/init_config.html#index-37">[1]</a>, <a href="faq/programming.html#index-4">[2]</a>, <a href="library/sys.html#index-6">[3]</a>, <a href="using/cmdline.html#envvar-PYTHONDONTWRITEBYTECODE">[4]</a>, <a href="using/cmdline.html#index-1">[5]</a>, <a href="whatsnew/2.6.html#index-20">[6]</a>, <a href="whatsnew/2.6.html#index-24">[7]</a>
</li>
        <li><a href="c-api/init_config.html#index-10">PYTHONDUMPREFS</a>, <a href="using/cmdline.html#envvar-PYTHONDUMPREFS">[1]</a>, <a href="using/configure.html#index-10">[2]</a>, <a href="using/configure.html#index-41">[3]</a>, <a href="whatsnew/3.8.html#index-3">[4]</a>, <a href="whatsnew/changelog.html#index-299">[5]</a>
</li>
        <li><a href="using/cmdline.html#envvar-PYTHONDUMPREFSFILE">PYTHONDUMPREFSFILE</a>, <a href="whatsnew/changelog.html#index-162">[1]</a>
</li>
        <li><a href="c-api/init_config.html#index-26">PYTHONEXECUTABLE</a>, <a href="using/cmdline.html#envvar-PYTHONEXECUTABLE">[1]</a>
</li>
        <li><a href="c-api/init_config.html#index-11">PYTHONFAULTHANDLER</a>, <a href="library/devmode.html#index-16">[1]</a>, <a href="library/faulthandler.html#index-0">[2]</a>, <a href="using/cmdline.html#envvar-PYTHONFAULTHANDLER">[3]</a>, <a href="using/cmdline.html#index-20">[4]</a>, <a href="whatsnew/3.3.html#index-24">[5]</a>
</li>
        <li><a href="c-api/init.html#index-3">PYTHONHASHSEED</a>, <a href="c-api/init.html#index-62">[1]</a>, <a href="c-api/init_config.html#index-12">[2]</a>, <a href="reference/datamodel.html#index-117">[3]</a>, <a href="using/cmdline.html#envvar-PYTHONHASHSEED">[4]</a>, <a href="using/cmdline.html#index-13">[5]</a>, <a href="using/cmdline.html#index-14">[6]</a>, <a href="using/cmdline.html#index-44">[7]</a>, <a href="whatsnew/3.3.html#index-23">[8]</a>, <a href="whatsnew/3.3.html#index-35">[9]</a>, <a href="whatsnew/changelog.html#index-329">[10]</a>
</li>
        <li><a href="c-api/init.html#index-26">PYTHONHOME</a>, <a href="c-api/init.html#index-27">[1]</a>, <a href="c-api/init.html#index-64">[2]</a>, <a href="c-api/init.html#index-73">[3]</a>, <a href="c-api/init_config.html#index-13">[4]</a>, <a href="c-api/init_config.html#index-14">[5]</a>, <a href="c-api/intro.html#index-24">[6]</a>, <a href="c-api/intro.html#index-41">[7]</a>, <a href="deprecations/c-api-pending-removal-in-3.15.html#index-2">[8]</a>, <a href="deprecations/index.html#index-11">[9]</a>, <a href="library/sys_path_init.html#index-2">[10]</a>, <a href="library/sys_path_init.html#index-4">[11]</a>, <a href="library/test.html#index-0">[12]</a>, <a href="using/cmdline.html#envvar-PYTHONHOME">[13]</a>, <a href="using/cmdline.html#index-36">[14]</a>, <a href="using/cmdline.html#index-37">[15]</a>, <a href="using/cmdline.html#index-4">[16]</a>, <a href="using/cmdline.html#index-40">[17]</a>, <a href="using/windows.html#index-35">[18]</a>, <a href="using/windows.html#index-37">[19]</a>, <a href="using/windows.html#index-39">[20]</a>, <a href="whatsnew/3.12.html#index-82">[21]</a>, <a href="whatsnew/3.13.html#index-85">[22]</a>, <a href="whatsnew/3.13.html#index-87">[23]</a>, <a href="whatsnew/3.6.html#index-2">[24]</a>
</li>
        <li><a href="c-api/init.html#index-65">PYTHONINSPECT</a>, <a href="c-api/init_config.html#index-16">[1]</a>, <a href="using/cmdline.html#envvar-PYTHONINSPECT">[2]</a>, <a href="using/cmdline.html#index-6">[3]</a>, <a href="whatsnew/2.3.html#index-28">[4]</a>
</li>
        <li><a href="c-api/init_config.html#index-17">PYTHONINTMAXSTRDIGITS</a>, <a href="library/stdtypes.html#index-68">[1]</a>, <a href="library/stdtypes.html#index-69">[2]</a>, <a href="library/sys.html#index-17">[3]</a>, <a href="using/cmdline.html#envvar-PYTHONINTMAXSTRDIGITS">[4]</a>, <a href="using/cmdline.html#index-22">[5]</a>, <a href="whatsnew/changelog.html#index-109">[6]</a>
</li>
        <li><a href="c-api/init_config.html#index-30">PYTHONIOENCODING</a>, <a href="library/os.html#index-59">[1]</a>, <a href="library/sys.html#index-37">[2]</a>, <a href="using/cmdline.html#envvar-PYTHONIOENCODING">[3]</a>, <a href="using/cmdline.html#index-50">[4]</a>, <a href="whatsnew/2.6.html#index-21">[5]</a>, <a href="whatsnew/3.4.html#index-54">[6]</a>
</li>
        <li><a href="c-api/init.html#index-66">PYTHONLEGACYWINDOWSFSENCODING</a>, <a href="c-api/init_config.html#index-1">[1]</a>, <a href="deprecations/index.html#index-9">[2]</a>, <a href="deprecations/pending-removal-in-3.16.html#index-2">[3]</a>, <a href="library/sys.html#index-33">[4]</a>, <a href="library/sys.html#index-34">[5]</a>, <a href="library/sys.html#index-36">[6]</a>, <a href="using/cmdline.html#envvar-PYTHONLEGACYWINDOWSFSENCODING">[7]</a>, <a href="whatsnew/3.12.html#index-79">[8]</a>, <a href="whatsnew/3.13.html#index-47">[9]</a>, <a href="whatsnew/3.13.html#index-83">[10]</a>, <a href="whatsnew/3.6.html#index-19">[11]</a>, <a href="whatsnew/changelog.html#index-31">[12]</a>
</li>
        <li><a href="c-api/init.html#index-9">PYTHONLEGACYWINDOWSSTDIO</a>, <a href="c-api/init_config.html#index-19">[1]</a>, <a href="library/sys.html#index-39">[2]</a>, <a href="using/cmdline.html#envvar-PYTHONLEGACYWINDOWSSTDIO">[3]</a>, <a href="using/cmdline.html#index-45">[4]</a>, <a href="whatsnew/3.6.html#index-21">[5]</a>
</li>
        <li><a href="c-api/memory.html#index-1">PYTHONMALLOC</a>, <a href="c-api/memory.html#index-3">[1]</a>, <a href="c-api/memory.html#index-4">[2]</a>, <a href="c-api/memory.html#index-5">[3]</a>, <a href="library/devmode.html#index-14">[4]</a>, <a href="library/devmode.html#index-15">[5]</a>, <a href="using/cmdline.html#envvar-PYTHONMALLOC">[6]</a>, <a href="using/cmdline.html#index-48">[7]</a>, <a href="using/configure.html#index-39">[8]</a>, <a href="using/configure.html#index-40">[9]</a>, <a href="whatsnew/3.6.html#index-27">[10]</a>, <a href="whatsnew/3.6.html#index-38">[11]</a>, <a href="whatsnew/changelog.html#index-400">[12]</a>
</li>
        <li><a href="c-api/init_config.html#index-21">PYTHONMALLOCSTATS</a>, <a href="c-api/memory.html#index-2">[1]</a>, <a href="using/cmdline.html#envvar-PYTHONMALLOCSTATS">[2]</a>, <a href="whatsnew/changelog.html#index-401">[3]</a>
</li>
        <li><a href="c-api/init_config.html#index-7">PYTHONNODEBUGRANGES</a>, <a href="reference/datamodel.html#index-63">[1]</a>, <a href="using/cmdline.html#envvar-PYTHONNODEBUGRANGES">[2]</a>, <a href="using/cmdline.html#index-28">[3]</a>, <a href="whatsnew/3.11.html#index-89">[4]</a>
</li>
        <li><a href="c-api/init.html#index-69">PYTHONNOUSERSITE</a>, <a href="c-api/init_config.html#index-34">[1]</a>, <a href="library/site.html#index-6">[2]</a>, <a href="using/cmdline.html#envvar-PYTHONNOUSERSITE">[3]</a>, <a href="using/cmdline.html#index-62">[4]</a>, <a href="whatsnew/2.6.html#index-6">[5]</a>
</li>
        <li><a href="c-api/init.html#index-70">PYTHONOPTIMIZE</a>, <a href="c-api/init_config.html#index-24">[1]</a>, <a href="using/cmdline.html#envvar-PYTHONOPTIMIZE">[2]</a>, <a href="using/cmdline.html#index-8">[3]</a>
</li>
        <li><a href="c-api/init.html#index-63">PYTHONPATH</a>, <a href="c-api/init_config.html#index-23">[1]</a>, <a href="c-api/intro.html#index-25">[2]</a>, <a href="c-api/intro.html#index-42">[3]</a>, <a href="extending/building.html#index-4">[4]</a>, <a href="library/sys.html#index-22">[5]</a>, <a href="library/sys.html#index-23">[6]</a>, <a href="library/sys_path_init.html#index-0">[7]</a>, <a href="library/sys_path_init.html#index-1">[8]</a>, <a href="library/test.html#index-1">[9]</a>, <a href="reference/import.html#index-15">[10]</a>, <a href="tutorial/modules.html#index-14">[11]</a>, <a href="tutorial/modules.html#index-17">[12]</a>, <a href="tutorial/modules.html#index-18">[13]</a>, <a href="using/cmdline.html#envvar-PYTHONPATH">[14]</a>, <a href="using/cmdline.html#index-3">[15]</a>, <a href="using/cmdline.html#index-39">[16]</a>, <a href="using/cmdline.html#index-41">[17]</a>, <a href="using/cmdline.html#index-42">[18]</a>, <a href="using/windows.html#index-12">[19]</a>, <a href="using/windows.html#index-34">[20]</a>, <a href="using/windows.html#index-36">[21]</a>, <a href="using/windows.html#index-38">[22]</a>, <a href="whatsnew/3.4.html#index-56">[23]</a>, <a href="whatsnew/3.4.html#index-57">[24]</a>
</li>
        <li><a href="howto/perf_profiling.html#index-3">PYTHONPERFSUPPORT</a>, <a href="using/cmdline.html#envvar-PYTHONPERFSUPPORT">[1]</a>, <a href="using/cmdline.html#index-30">[2]</a>, <a href="whatsnew/3.12.html#index-24">[3]</a>
</li>
        <li><a href="c-api/init_config.html#index-22">PYTHONPLATLIBDIR</a>, <a href="library/sys_path_init.html#index-3">[1]</a>, <a href="using/cmdline.html#envvar-PYTHONPLATLIBDIR">[2]</a>, <a href="whatsnew/changelog.html#index-231">[3]</a>
</li>
        <li><a href="c-api/init_config.html#index-15">PYTHONPROFILEIMPORTTIME</a>, <a href="using/cmdline.html#envvar-PYTHONPROFILEIMPORTTIME">[1]</a>, <a href="using/cmdline.html#index-23">[2]</a>, <a href="whatsnew/3.7.html#index-28">[3]</a>, <a href="whatsnew/changelog.html#index-337">[4]</a>
</li>
        <li><a href="c-api/init_config.html#index-28">PYTHONPYCACHEPREFIX</a>, <a href="library/sys.html#index-7">[1]</a>, <a href="using/cmdline.html#envvar-PYTHONPYCACHEPREFIX">[2]</a>, <a href="using/cmdline.html#index-26">[3]</a>, <a href="whatsnew/3.8.html#index-2">[4]</a>, <a href="whatsnew/changelog.html#index-306">[5]</a>
</li>
        <li><a href="whatsnew/changelog.html#index-134">PYTHONREGRTEST_UNICODE_GUARD</a>
</li>
        <li><a href="c-api/init_config.html#index-4">PYTHONSAFEPATH</a>, <a href="library/security_warnings.html#index-6">[1]</a>, <a href="library/sys.html#index-24">[2]</a>, <a href="using/cmdline.html#envvar-PYTHONSAFEPATH">[3]</a>, <a href="using/cmdline.html#index-12">[4]</a>, <a href="whatsnew/3.11.html#index-104">[5]</a>, <a href="whatsnew/3.11.html#index-84">[6]</a>, <a href="whatsnew/changelog.html#index-124">[7]</a>
</li>
        <li><a href="library/asyncio.html#index-0">PYTHONSTARTUP</a>, <a href="library/idle.html#index-6">[1]</a>, <a href="library/idle.html#index-8">[2]</a>, <a href="library/readline.html#index-0">[3]</a>, <a href="library/site.html#index-5">[4]</a>, <a href="library/sys.html#index-18">[5]</a>, <a href="tutorial/appendix.html#index-14">[6]</a>, <a href="using/cmdline.html#envvar-PYTHONSTARTUP">[7]</a>, <a href="using/cmdline.html#index-43">[8]</a>, <a href="using/cmdline.html#index-5">[9]</a>, <a href="whatsnew/3.4.html#index-41">[10]</a>, <a href="whatsnew/3.4.html#index-42">[11]</a>, <a href="whatsnew/changelog.html#index-316">[12]</a>, <a href="whatsnew/changelog.html#index-324">[13]</a>, <a href="whatsnew/changelog.html#index-359">[14]</a>
</li>
        <li><a href="c-api/init_config.html#index-31">PYTHONTRACEMALLOC</a>, <a href="library/tracemalloc.html#index-0">[1]</a>, <a href="library/tracemalloc.html#index-1">[2]</a>, <a href="library/tracemalloc.html#index-2">[3]</a>, <a href="using/cmdline.html#envvar-PYTHONTRACEMALLOC">[4]</a>, <a href="using/cmdline.html#index-21">[5]</a>
</li>
        <li><a href="library/zoneinfo.html#envvar-PYTHONTZPATH">PYTHONTZPATH</a>, <a href="library/zoneinfo.html#index-2">[1]</a>
</li>
        <li><a href="c-api/init.html#index-71">PYTHONUNBUFFERED</a>, <a href="c-api/init_config.html#index-6">[1]</a>, <a href="library/sys.html#index-40">[2]</a>, <a href="using/cmdline.html#envvar-PYTHONUNBUFFERED">[3]</a>, <a href="using/cmdline.html#index-63">[4]</a>, <a href="whatsnew/changelog.html#index-285">[5]</a>
</li>
        <li><a href="whatsnew/changelog.html#index-36">PYTHONUOPS</a>, <a href="whatsnew/changelog.html#index-37">[1]</a>, <a href="whatsnew/changelog.html#index-38">[2]</a>, <a href="whatsnew/changelog.html#index-39">[3]</a>, <a href="whatsnew/changelog.html#index-41">[4]</a>
</li>
        <li><a href="library/site.html#index-7">PYTHONUSERBASE</a>, <a href="library/site.html#index-8">[1]</a>, <a href="using/cmdline.html#envvar-PYTHONUSERBASE">[2]</a>, <a href="whatsnew/2.6.html#index-4">[3]</a>
</li>
        <li><a href="library/test.html#index-2">PYTHONUSERSITE</a>
</li>
        <li><a href="c-api/init_config.html#index-2">PYTHONUTF8</a>, <a href="c-api/init_config.html#index-40">[1]</a>, <a href="library/os.html#index-2">[2]</a>, <a href="library/os.html#index-3">[3]</a>, <a href="library/sys.html#index-38">[4]</a>, <a href="using/cmdline.html#envvar-PYTHONUTF8">[5]</a>, <a href="using/cmdline.html#index-25">[6]</a>, <a href="using/cmdline.html#index-51">[7]</a>, <a href="using/windows.html#index-16">[8]</a>, <a href="whatsnew/3.7.html#index-8">[9]</a>
</li>
        <li><a href="c-api/init.html#index-72">PYTHONVERBOSE</a>, <a href="c-api/init_config.html#index-35">[1]</a>, <a href="using/cmdline.html#envvar-PYTHONVERBOSE">[2]</a>, <a href="using/cmdline.html#index-64">[3]</a>
</li>
        <li><a href="library/io.html#index-9">PYTHONWARNDEFAULTENCODING</a>, <a href="using/cmdline.html#envvar-PYTHONWARNDEFAULTENCODING">[1]</a>, <a href="using/cmdline.html#index-27">[2]</a>, <a href="whatsnew/3.10.html#index-99">[3]</a>, <a href="whatsnew/changelog.html#index-183">[4]</a>
</li>
        <li><a href="c-api/init_config.html#index-36">PYTHONWARNINGS</a>, <a href="library/devmode.html#index-13">[1]</a>, <a href="library/warnings.html#index-1">[2]</a>, <a href="library/warnings.html#index-2">[3]</a>, <a href="library/warnings.html#index-3">[4]</a>, <a href="library/warnings.html#index-4">[5]</a>, <a href="library/warnings.html#index-5">[6]</a>, <a href="using/cmdline.html#envvar-PYTHONWARNINGS">[7]</a>, <a href="using/cmdline.html#index-19">[8]</a>, <a href="whatsnew/2.7.html#index-1">[9]</a>, <a href="whatsnew/2.7.html#index-8">[10]</a>, <a href="whatsnew/3.2.html#index-10">[11]</a>, <a href="whatsnew/3.7.html#index-37">[12]</a>, <a href="whatsnew/changelog.html#index-119">[13]</a>
</li>
        <li><a href="library/compileall.html#index-1">SOURCE_DATE_EPOCH</a>, <a href="library/py_compile.html#index-3">[1]</a>, <a href="library/py_compile.html#index-6">[2]</a>, <a href="library/py_compile.html#index-7">[3]</a>, <a href="whatsnew/3.7.html#index-32">[4]</a>, <a href="whatsnew/changelog.html#index-308">[5]</a>, <a href="whatsnew/changelog.html#index-328">[6]</a>
</li>
        <li><a href="library/ssl.html#index-35">SSLKEYLOGFILE</a>, <a href="library/ssl.html#index-36">[1]</a>
</li>
        <li><a href="library/subprocess.html#index-4">SystemRoot</a>
</li>
        <li><a href="library/tempfile.html#index-8">TEMP</a>, <a href="using/windows.html#index-8">[1]</a>
</li>
        <li><a href="library/curses.html#index-1">TERM</a>, <a href="library/curses.html#index-2">[1]</a>
</li>
        <li><a href="library/tempfile.html#index-9">TMP</a>
</li>
        <li><a href="library/tempfile.html#index-7">TMPDIR</a>, <a href="whatsnew/changelog.html#index-120">[1]</a>
</li>
        <li><a href="library/time.html#index-37">TZ</a>, <a href="library/time.html#index-38">[1]</a>, <a href="library/time.html#index-39">[2]</a>, <a href="library/time.html#index-40">[3]</a>, <a href="library/time.html#index-41">[4]</a>, <a href="library/time.html#index-42">[5]</a>
</li>
        <li><a href="library/getpass.html#index-1">USER</a>
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        <li><a href="library/getpass.html#index-2">USERNAME</a>, <a href="library/os.html#index-11">[1]</a>, <a href="library/os.path.html#index-20">[2]</a>
</li>
        <li><a href="library/os.path.html#index-17">USERPROFILE</a>, <a href="whatsnew/3.8.html#index-13">[1]</a>, <a href="whatsnew/3.8.html#index-20">[2]</a>, <a href="whatsnew/changelog.html#index-281">[3]</a>
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