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Title: 1. Command line and environment — Python 3.9.24 documentation

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Domain: docs.python.org

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https://www.python.org/
Table of Contentshttps://docs.python.org/3.9/contents.html
1. Command line and environmenthttps://docs.python.org/3.9/using/cmdline.html
1.1. Command linehttps://docs.python.org/3.9/using/cmdline.html#command-line
1.1.1. Interface optionshttps://docs.python.org/3.9/using/cmdline.html#interface-options
1.1.2. Generic optionshttps://docs.python.org/3.9/using/cmdline.html#generic-options
1.1.3. Miscellaneous optionshttps://docs.python.org/3.9/using/cmdline.html#miscellaneous-options
1.1.4. Options you shouldn’t usehttps://docs.python.org/3.9/using/cmdline.html#options-you-shouldn-t-use
1.2. Environment variableshttps://docs.python.org/3.9/using/cmdline.html#environment-variables
1.2.1. Debug-mode variableshttps://docs.python.org/3.9/using/cmdline.html#debug-mode-variables
Python Setup and Usagehttps://docs.python.org/3.9/using/index.html
2. Using Python on Unix platformshttps://docs.python.org/3.9/using/unix.html
Report a Bughttps://docs.python.org/3.9/bugs.html
Show Source https://github.com/python/cpython/blob/3.9/Doc/using/cmdline.rst
Python documentation for the current stable releasehttps://docs.python.org/3/using/cmdline.html
indexhttps://docs.python.org/3.9/genindex.html
moduleshttps://docs.python.org/3.9/py-modindex.html
nexthttps://docs.python.org/3.9/using/unix.html
previoushttps://docs.python.org/3.9/using/index.html
Pythonhttps://www.python.org/
3.9.24 Documentationhttps://docs.python.org/3.9/index.html
Python Setup and Usagehttps://docs.python.org/3.9/using/index.html
https://docs.python.org/3.9/using/cmdline.html#command-line-and-environment
Alternate Implementationshttps://docs.python.org/3.9/reference/introduction.html#implementations
https://docs.python.org/3.9/using/cmdline.html#command-line
https://docs.python.org/3.9/using/cmdline.html#interface-options
sys.argvhttps://docs.python.org/3.9/library/sys.html#sys.argv
https://docs.python.org/3.9/using/cmdline.html#cmdoption-c
sys.argvhttps://docs.python.org/3.9/library/sys.html#sys.argv
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
auditing eventhttps://docs.python.org/3.9/library/sys.html#auditing
https://docs.python.org/3.9/using/cmdline.html#cmdoption-m
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
__main__https://docs.python.org/3.9/library/__main__.html#module-__main__
sys.argvhttps://docs.python.org/3.9/library/sys.html#sys.argv
-chttps://docs.python.org/3.9/using/cmdline.html#cmdoption-c
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
-Ihttps://docs.python.org/3.9/using/cmdline.html#id2
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
timeithttps://docs.python.org/3.9/library/timeit.html#module-timeit
auditing eventhttps://docs.python.org/3.9/library/sys.html#auditing
runpy.run_module()https://docs.python.org/3.9/library/runpy.html#runpy.run_module
PEP 338https://www.python.org/dev/peps/pep-0338
sys.stdinhttps://docs.python.org/3.9/library/sys.html#sys.stdin
-ihttps://docs.python.org/3.9/using/cmdline.html#cmdoption-i
sys.argvhttps://docs.python.org/3.9/library/sys.html#sys.argv
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
auditing eventhttps://docs.python.org/3.9/library/sys.html#auditing
sys.argvhttps://docs.python.org/3.9/library/sys.html#sys.argv
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
__main__https://docs.python.org/3.9/library/__main__.html#module-__main__
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
__main__https://docs.python.org/3.9/library/__main__.html#module-__main__
-Ihttps://docs.python.org/3.9/using/cmdline.html#id2
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
auditing eventhttps://docs.python.org/3.9/library/sys.html#auditing
runpy.run_path()https://docs.python.org/3.9/library/runpy.html#runpy.run_path
-ihttps://docs.python.org/3.9/using/cmdline.html#cmdoption-i
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
Readline configurationhttps://docs.python.org/3.9/library/site.html#rlcompleter-config
Invoking the Interpreterhttps://docs.python.org/3.9/tutorial/interpreter.html#tut-invoking
https://docs.python.org/3.9/using/cmdline.html#generic-options
https://docs.python.org/3.9/using/cmdline.html#cmdoption
https://docs.python.org/3.9/using/cmdline.html#cmdoption-h
https://docs.python.org/3.9/using/cmdline.html#cmdoption-help
https://docs.python.org/3.9/using/cmdline.html#cmdoption-v
https://docs.python.org/3.9/using/cmdline.html#cmdoption-version
https://docs.python.org/3.9/using/cmdline.html#miscellaneous-options
https://docs.python.org/3.9/using/cmdline.html#cmdoption-b
byteshttps://docs.python.org/3.9/library/stdtypes.html#bytes
bytearrayhttps://docs.python.org/3.9/library/stdtypes.html#bytearray
strhttps://docs.python.org/3.9/library/stdtypes.html#str
byteshttps://docs.python.org/3.9/library/stdtypes.html#bytes
inthttps://docs.python.org/3.9/library/functions.html#int
byteshttps://docs.python.org/3.9/library/stdtypes.html#bytes
inthttps://docs.python.org/3.9/library/functions.html#int
https://docs.python.org/3.9/using/cmdline.html#id1
PYTHONDONTWRITEBYTECODEhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONDONTWRITEBYTECODE
https://docs.python.org/3.9/using/cmdline.html#cmdoption-check-hash-based-pycs
Cached bytecode invalidationhttps://docs.python.org/3.9/reference/import.html#pyc-invalidation
https://docs.python.org/3.9/using/cmdline.html#cmdoption-d
PYTHONDEBUGhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONDEBUG
https://docs.python.org/3.9/using/cmdline.html#cmdoption-e
PYTHONPATHhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONPATH
PYTHONHOMEhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONHOME
https://docs.python.org/3.9/using/cmdline.html#cmdoption-i
-chttps://docs.python.org/3.9/using/cmdline.html#cmdoption-c
sys.stdinhttps://docs.python.org/3.9/library/sys.html#sys.stdin
PYTHONSTARTUPhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONSTARTUP
PYTHONINSPECThttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONINSPECT
https://docs.python.org/3.9/using/cmdline.html#id2
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
https://docs.python.org/3.9/using/cmdline.html#cmdoption-o
__debug__https://docs.python.org/3.9/library/constants.html#__debug__
bytecodehttps://docs.python.org/3.9/glossary.html#term-bytecode
PEP 488https://www.python.org/dev/peps/pep-0488
PYTHONOPTIMIZEhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONOPTIMIZE
PEP 488https://www.python.org/dev/peps/pep-0488
https://docs.python.org/3.9/using/cmdline.html#cmdoption-oo
-Ohttps://docs.python.org/3.9/using/cmdline.html#cmdoption-o
bytecodehttps://docs.python.org/3.9/glossary.html#term-bytecode
PEP 488https://www.python.org/dev/peps/pep-0488
PEP 488https://www.python.org/dev/peps/pep-0488
https://docs.python.org/3.9/using/cmdline.html#cmdoption-q
https://docs.python.org/3.9/using/cmdline.html#cmdoption-r
PYTHONHASHSEEDhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONHASHSEED
__hash__()https://docs.python.org/3.9/reference/datamodel.html#object.__hash__
http://www.ocert.org/advisories/ocert-2011-003.htmlhttp://www.ocert.org/advisories/ocert-2011-003.html
PYTHONHASHSEEDhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONHASHSEED
https://docs.python.org/3.9/using/cmdline.html#cmdoption-s
user site-packages directoryhttps://docs.python.org/3.9/library/site.html#site.USER_SITE
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
PEP 370https://www.python.org/dev/peps/pep-0370
https://docs.python.org/3.9/using/cmdline.html#id3
sitehttps://docs.python.org/3.9/library/site.html#module-site
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
sitehttps://docs.python.org/3.9/library/site.html#module-site
site.main()https://docs.python.org/3.9/library/site.html#site.main
https://docs.python.org/3.9/using/cmdline.html#cmdoption-u
PYTHONUNBUFFEREDhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONUNBUFFERED
https://docs.python.org/3.9/using/cmdline.html#id4
PYTHONVERBOSEhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONVERBOSE
https://docs.python.org/3.9/using/cmdline.html#cmdoption-w
sys.stderrhttps://docs.python.org/3.9/library/sys.html#sys.stderr
-Whttps://docs.python.org/3.9/using/cmdline.html#cmdoption-w
-Whttps://docs.python.org/3.9/using/cmdline.html#cmdoption-w
PYTHONWARNINGShttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONWARNINGS
warningshttps://docs.python.org/3.9/library/warnings.html#module-warnings
The Warnings Filterhttps://docs.python.org/3.9/library/warnings.html#warning-filter
Describing Warning Filtershttps://docs.python.org/3.9/library/warnings.html#describing-warning-filters
https://docs.python.org/3.9/using/cmdline.html#cmdoption-x
https://docs.python.org/3.9/using/cmdline.html#id5
faulthandlerhttps://docs.python.org/3.9/library/faulthandler.html#module-faulthandler
PYTHONOLDPARSERhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONOLDPARSER
PEP 617https://www.python.org/dev/peps/pep-0617
tracemallochttps://docs.python.org/3.9/library/tracemalloc.html#module-tracemalloc
tracemalloc.start()https://docs.python.org/3.9/library/tracemalloc.html#tracemalloc.start
integer string conversion length limitationhttps://docs.python.org/3.9/library/stdtypes.html#int-max-str-digits
PYTHONINTMAXSTRDIGITShttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONINTMAXSTRDIGITS
PYTHONPROFILEIMPORTTIMEhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONPROFILEIMPORTTIME
Python Development Modehttps://docs.python.org/3.9/library/devmode.html#devmode
PYTHONUTF8https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONUTF8
PYTHONPYCACHEPREFIXhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONPYCACHEPREFIX
sys._xoptionshttps://docs.python.org/3.9/library/sys.html#sys._xoptions
-Xhttps://docs.python.org/3.9/using/cmdline.html#id5
io.IOBasehttps://docs.python.org/3.9/library/io.html#io.IOBase
https://docs.python.org/3.9/using/cmdline.html#options-you-shouldn-t-use
https://docs.python.org/3.9/using/cmdline.html#cmdoption-j
Jythonhttp://www.jython.org/
https://docs.python.org/3.9/using/cmdline.html#environment-variables
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONHOME
PYTHONHOMEhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONHOME
PYTHONHOMEhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONHOME
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONPATH
os.pathsephttps://docs.python.org/3.9/library/os.html#os.pathsep
PYTHONPATHhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONPATH
PYTHONHOMEhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONHOME
PYTHONPATHhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONPATH
PYTHONPATHhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONPATH
Interface optionshttps://docs.python.org/3.9/using/cmdline.html#using-on-interface-options
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONPLATLIBDIR
sys.platlibdirhttps://docs.python.org/3.9/library/sys.html#sys.platlibdir
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONSTARTUP
sys.ps1https://docs.python.org/3.9/library/sys.html#sys.ps1
sys.ps2https://docs.python.org/3.9/library/sys.html#sys.ps2
sys.__interactivehook__https://docs.python.org/3.9/library/sys.html#sys.__interactivehook__
auditing eventhttps://docs.python.org/3.9/library/sys.html#auditing
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONOPTIMIZE
-Ohttps://docs.python.org/3.9/using/cmdline.html#cmdoption-o
-Ohttps://docs.python.org/3.9/using/cmdline.html#cmdoption-o
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONBREAKPOINT
sys.breakpointhook()https://docs.python.org/3.9/library/sys.html#sys.breakpointhook
breakpoint()https://docs.python.org/3.9/library/functions.html#breakpoint
sys.breakpointhook()https://docs.python.org/3.9/library/sys.html#sys.breakpointhook
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONDEBUG
-dhttps://docs.python.org/3.9/using/cmdline.html#cmdoption-d
-dhttps://docs.python.org/3.9/using/cmdline.html#cmdoption-d
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONOLDPARSER
-Xhttps://docs.python.org/3.9/using/cmdline.html#id5
PEP 617https://www.python.org/dev/peps/pep-0617
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONINSPECT
-ihttps://docs.python.org/3.9/using/cmdline.html#cmdoption-i
os.environhttps://docs.python.org/3.9/library/os.html#os.environ
auditing eventhttps://docs.python.org/3.9/library/sys.html#auditing
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONUNBUFFERED
-uhttps://docs.python.org/3.9/using/cmdline.html#cmdoption-u
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONVERBOSE
-vhttps://docs.python.org/3.9/using/cmdline.html#id4
-vhttps://docs.python.org/3.9/using/cmdline.html#id4
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONCASEOK
importhttps://docs.python.org/3.9/reference/simple_stmts.html#import
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONDONTWRITEBYTECODE
-Bhttps://docs.python.org/3.9/using/cmdline.html#id1
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONPYCACHEPREFIX
-Xhttps://docs.python.org/3.9/using/cmdline.html#id5
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONHASHSEED
PYTHONHASHSEEDhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONHASHSEED
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONINTMAXSTRDIGITS
integer string conversion length limitationhttps://docs.python.org/3.9/library/stdtypes.html#int-max-str-digits
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONIOENCODING
str.encode()https://docs.python.org/3.9/library/stdtypes.html#str.encode
PYTHONLEGACYWINDOWSSTDIOhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONLEGACYWINDOWSSTDIO
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONNOUSERSITE
user site-packages directoryhttps://docs.python.org/3.9/library/site.html#site.USER_SITE
sys.pathhttps://docs.python.org/3.9/library/sys.html#sys.path
PEP 370https://www.python.org/dev/peps/pep-0370
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONUSERBASE
user base directoryhttps://docs.python.org/3.9/library/site.html#site.USER_BASE
user site-packages directoryhttps://docs.python.org/3.9/library/site.html#site.USER_SITE
Distutils installation pathshttps://docs.python.org/3.9/install/index.html#inst-alt-install-user
PEP 370https://www.python.org/dev/peps/pep-0370
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONEXECUTABLE
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONWARNINGS
-Whttps://docs.python.org/3.9/using/cmdline.html#cmdoption-w
-Whttps://docs.python.org/3.9/using/cmdline.html#cmdoption-w
The Warnings Filterhttps://docs.python.org/3.9/library/warnings.html#warning-filter
Describing Warning Filtershttps://docs.python.org/3.9/library/warnings.html#describing-warning-filters
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONFAULTHANDLER
faulthandler.enable()https://docs.python.org/3.9/library/faulthandler.html#faulthandler.enable
-Xhttps://docs.python.org/3.9/using/cmdline.html#id5
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONTRACEMALLOC
tracemallochttps://docs.python.org/3.9/library/tracemalloc.html#module-tracemalloc
tracemalloc.start()https://docs.python.org/3.9/library/tracemalloc.html#tracemalloc.start
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONPROFILEIMPORTTIME
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONASYNCIODEBUG
debug modehttps://docs.python.org/3.9/library/asyncio-dev.html#asyncio-debug-mode
asynciohttps://docs.python.org/3.9/library/asyncio.html#module-asyncio
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONMALLOC
default memory allocatorshttps://docs.python.org/3.9/c-api/memory.html#default-memory-allocators
PYMEM_DOMAIN_RAWhttps://docs.python.org/3.9/c-api/memory.html#c.PYMEM_DOMAIN_RAW
PYMEM_DOMAIN_MEMhttps://docs.python.org/3.9/c-api/memory.html#c.PYMEM_DOMAIN_MEM
PYMEM_DOMAIN_OBJhttps://docs.python.org/3.9/c-api/memory.html#c.PYMEM_DOMAIN_OBJ
pymalloc allocatorhttps://docs.python.org/3.9/c-api/memory.html#pymalloc
PYMEM_DOMAIN_MEMhttps://docs.python.org/3.9/c-api/memory.html#c.PYMEM_DOMAIN_MEM
PYMEM_DOMAIN_OBJhttps://docs.python.org/3.9/c-api/memory.html#c.PYMEM_DOMAIN_OBJ
PYMEM_DOMAIN_RAWhttps://docs.python.org/3.9/c-api/memory.html#c.PYMEM_DOMAIN_RAW
default memory allocatorshttps://docs.python.org/3.9/c-api/memory.html#default-memory-allocators
default memory allocatorshttps://docs.python.org/3.9/c-api/memory.html#default-memory-allocators
PyMem_SetupDebugHooks()https://docs.python.org/3.9/c-api/memory.html#c.PyMem_SetupDebugHooks
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONMALLOCSTATS
pymalloc memory allocatorhttps://docs.python.org/3.9/c-api/memory.html#pymalloc
PYTHONMALLOChttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONMALLOC
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONLEGACYWINDOWSFSENCODING
sys._enablelegacywindowsfsencoding()https://docs.python.org/3.9/library/sys.html#sys._enablelegacywindowsfsencoding
Availabilityhttps://docs.python.org/3.9/library/intro.html#availability
PEP 529https://www.python.org/dev/peps/pep-0529
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONLEGACYWINDOWSSTDIO
Availabilityhttps://docs.python.org/3.9/library/intro.html#availability
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONCOERCECLOCALE
locale.getdefaultlocale()https://docs.python.org/3.9/library/locale.html#locale.getdefaultlocale
error handlerhttps://docs.python.org/3.9/library/codecs.html#error-handlers
sys.stdinhttps://docs.python.org/3.9/library/sys.html#sys.stdin
sys.stdouthttps://docs.python.org/3.9/library/sys.html#sys.stdout
sys.stderrhttps://docs.python.org/3.9/library/sys.html#sys.stderr
PYTHONIOENCODINGhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONIOENCODING
PYTHONUTF8https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONUTF8
Availabilityhttps://docs.python.org/3.9/library/intro.html#availability
PEP 538https://www.python.org/dev/peps/pep-0538
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONDEVMODE
Python Development Modehttps://docs.python.org/3.9/library/devmode.html#devmode
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONUTF8
sys.getfilesystemencoding()https://docs.python.org/3.9/library/sys.html#sys.getfilesystemencoding
locale.getpreferredencoding()https://docs.python.org/3.9/library/locale.html#locale.getpreferredencoding
sys.stdinhttps://docs.python.org/3.9/library/sys.html#sys.stdin
sys.stdouthttps://docs.python.org/3.9/library/sys.html#sys.stdout
sys.stderrhttps://docs.python.org/3.9/library/sys.html#sys.stderr
error handlerhttps://docs.python.org/3.9/library/codecs.html#error-handlers
sys.stdinhttps://docs.python.org/3.9/library/sys.html#sys.stdin
sys.stdouthttps://docs.python.org/3.9/library/sys.html#sys.stdout
sys.stderrhttps://docs.python.org/3.9/library/sys.html#sys.stderr
os.fsdecode()https://docs.python.org/3.9/library/os.html#os.fsdecode
os.fsencode()https://docs.python.org/3.9/library/os.html#os.fsencode
open()https://docs.python.org/3.9/library/functions.html#open
io.open()https://docs.python.org/3.9/library/io.html#io.open
codecs.open()https://docs.python.org/3.9/library/codecs.html#codecs.open
PYTHONIOENCODINGhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONIOENCODING
PYTHONCOERCECLOCALEhttps://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONCOERCECLOCALE
-Xhttps://docs.python.org/3.9/using/cmdline.html#id5
PEP 540https://www.python.org/dev/peps/pep-0540
https://docs.python.org/3.9/using/cmdline.html#debug-mode-variables
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONTHREADDEBUG
https://docs.python.org/3.9/using/cmdline.html#envvar-PYTHONDUMPREFS
Table of Contentshttps://docs.python.org/3.9/contents.html
1. Command line and environmenthttps://docs.python.org/3.9/using/cmdline.html
1.1. Command linehttps://docs.python.org/3.9/using/cmdline.html#command-line
1.1.1. Interface optionshttps://docs.python.org/3.9/using/cmdline.html#interface-options
1.1.2. Generic optionshttps://docs.python.org/3.9/using/cmdline.html#generic-options
1.1.3. Miscellaneous optionshttps://docs.python.org/3.9/using/cmdline.html#miscellaneous-options
1.1.4. Options you shouldn’t usehttps://docs.python.org/3.9/using/cmdline.html#options-you-shouldn-t-use
1.2. Environment variableshttps://docs.python.org/3.9/using/cmdline.html#environment-variables
1.2.1. Debug-mode variableshttps://docs.python.org/3.9/using/cmdline.html#debug-mode-variables
Python Setup and Usagehttps://docs.python.org/3.9/using/index.html
2. Using Python on Unix platformshttps://docs.python.org/3.9/using/unix.html
Report a Bughttps://docs.python.org/3.9/bugs.html
Show Source https://github.com/python/cpython/blob/3.9/Doc/using/cmdline.rst
indexhttps://docs.python.org/3.9/genindex.html
moduleshttps://docs.python.org/3.9/py-modindex.html
nexthttps://docs.python.org/3.9/using/unix.html
previoushttps://docs.python.org/3.9/using/index.html
Pythonhttps://www.python.org/
3.9.24 Documentationhttps://docs.python.org/3.9/index.html
Python Setup and Usagehttps://docs.python.org/3.9/using/index.html
Copyrighthttps://docs.python.org/3.9/copyright.html
History and Licensehttps://docs.python.org/license.html
Please donate.https://www.python.org/psf/donations/
Found a bughttps://docs.python.org/bugs.html
Sphinxhttps://www.sphinx-doc.org/

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