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Title: sys — System-specific parameters and functions — Python 3.14.2 documentation

Open Graph Title: sys — System-specific parameters and functions

Description: This module provides access to some variables used or maintained by the interpreter and to functions that interact strongly with the interpreter. It is always available. Unless explicitly noted oth...

Open Graph Description: This module provides access to some variables used or maintained by the interpreter and to functions that interact strongly with the interpreter. It is always available. Unless explicitly noted oth...

Opengraph URL: https://docs.python.org/3/library/sys.html

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Domain: docs.python.org

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og:image:alt	This module provides access to some variables used or maintained by the interpreter and to functions that interact strongly with the interpreter. It is always available. Unless explicitly noted oth...
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Links:

	https://www.python.org/
Python Runtime Services	https://docs.python.org/library/python.html
sys.monitoring — Execution event monitoring	https://docs.python.org/library/sys.monitoring.html
Report a bug	https://docs.python.org/bugs.html
Show source	https://github.com/python/cpython/blob/main/Doc/library/sys.rst?plain=1
index	https://docs.python.org/genindex.html
modules	https://docs.python.org/py-modindex.html
next	https://docs.python.org/library/sys.monitoring.html
previous	https://docs.python.org/library/python.html
Python	https://www.python.org/
3.14.2 Documentation	https://docs.python.org/index.html
The Python Standard Library	https://docs.python.org/library/index.html
Python Runtime Services	https://docs.python.org/library/python.html
sys — System-specific parameters and functions	https://docs.python.org/library/sys.html
¶	https://docs.python.org/library/sys.html#module-sys
¶	https://docs.python.org/library/sys.html#sys.abiflags
PEP 3149	https://peps.python.org/pep-3149/
Availability	https://docs.python.org/library/intro.html#availability
¶	https://docs.python.org/library/sys.html#sys.addaudithook
sys.audit()	https://docs.python.org/library/sys.html#sys.audit
PySys_AddAuditHook()	https://docs.python.org/c-api/sys.html#c.PySys_AddAuditHook
PySys_AddAuditHook()	https://docs.python.org/c-api/sys.html#c.PySys_AddAuditHook
ctypes	https://docs.python.org/library/ctypes.html#module-ctypes
sys.addaudithook()	https://docs.python.org/library/sys.html#sys.addaudithook
RuntimeError	https://docs.python.org/library/exceptions.html#RuntimeError
audit events table	https://docs.python.org/library/audit_events.html#audit-events
PEP 578	https://peps.python.org/pep-0578/
Exception	https://docs.python.org/library/exceptions.html#Exception
RuntimeError	https://docs.python.org/library/exceptions.html#RuntimeError
settrace()	https://docs.python.org/library/sys.html#sys.settrace
¶	https://docs.python.org/library/sys.html#sys.argv
-c	https://docs.python.org/using/cmdline.html#cmdoption-c
fileinput	https://docs.python.org/library/fileinput.html#module-fileinput
sys.orig_argv	https://docs.python.org/library/sys.html#sys.orig_argv
¶	https://docs.python.org/library/sys.html#sys.audit
sys.audit()	https://docs.python.org/library/sys.html#sys.audit
sys.addaudithook()	https://docs.python.org/library/sys.html#sys.addaudithook
PySys_AddAuditHook()	https://docs.python.org/c-api/sys.html#c.PySys_AddAuditHook
PySys_Audit()	https://docs.python.org/c-api/sys.html#c.PySys_Audit
audit events table	https://docs.python.org/library/audit_events.html#audit-events
¶	https://docs.python.org/library/sys.html#sys.base_exec_prefix
exec_prefix	https://docs.python.org/library/sys.html#sys.exec_prefix
Virtual Environments	https://docs.python.org/library/sys_path_init.html#sys-path-init-virtual-environments
exec_prefix	https://docs.python.org/library/sys.html#sys.exec_prefix
base_exec_prefix	https://docs.python.org/library/sys.html#sys.base_exec_prefix
Virtual Environments	https://docs.python.org/library/sys_path_init.html#sys-path-init-virtual-environments
¶	https://docs.python.org/library/sys.html#sys.base_prefix
prefix	https://docs.python.org/library/sys.html#sys.prefix
virtual environment	https://docs.python.org/library/venv.html#venv-def
prefix	https://docs.python.org/library/sys.html#sys.prefix
base_prefix	https://docs.python.org/library/sys.html#sys.base_prefix
Virtual Environments	https://docs.python.org/library/sys_path_init.html#sys-path-init-virtual-environments
¶	https://docs.python.org/library/sys.html#sys.byteorder
¶	https://docs.python.org/library/sys.html#sys.builtin_module_names
sys.stdlib_module_names	https://docs.python.org/library/sys.html#sys.stdlib_module_names
¶	https://docs.python.org/library/sys.html#sys.call_tracing
settrace()	https://docs.python.org/library/sys.html#sys.settrace
setprofile()	https://docs.python.org/library/sys.html#sys.setprofile
¶	https://docs.python.org/library/sys.html#sys.copyright
¶	https://docs.python.org/library/sys.html#sys._clear_type_cache
_clear_internal_caches()	https://docs.python.org/library/sys.html#sys._clear_internal_caches
¶	https://docs.python.org/library/sys.html#sys._clear_internal_caches
¶	https://docs.python.org/library/sys.html#sys._current_frames
traceback	https://docs.python.org/library/traceback.html#module-traceback
auditing event	https://docs.python.org/library/sys.html#auditing
¶	https://docs.python.org/library/sys.html#sys._current_exceptions
auditing event	https://docs.python.org/library/sys.html#auditing
¶	https://docs.python.org/library/sys.html#sys.breakpointhook
breakpoint()	https://docs.python.org/library/functions.html#breakpoint
pdb	https://docs.python.org/library/pdb.html#module-pdb
PYTHONBREAKPOINT	https://docs.python.org/using/cmdline.html#envvar-PYTHONBREAKPOINT
breakpoint()	https://docs.python.org/library/functions.html#breakpoint
PYTHONBREAKPOINT	https://docs.python.org/using/cmdline.html#envvar-PYTHONBREAKPOINT
RuntimeWarning	https://docs.python.org/library/exceptions.html#RuntimeWarning
PYTHONBREAKPOINT	https://docs.python.org/using/cmdline.html#envvar-PYTHONBREAKPOINT
¶	https://docs.python.org/library/sys.html#sys._debugmallocstats
built in debug mode	https://docs.python.org/using/configure.html#debug-build
configure --with-pydebug option	https://docs.python.org/using/configure.html#cmdoption-with-pydebug
¶	https://docs.python.org/library/sys.html#sys.dllhandle
Availability	https://docs.python.org/library/intro.html#availability
¶	https://docs.python.org/library/sys.html#sys.displayhook
expression	https://docs.python.org/glossary.html#term-expression
UnicodeEncodeError	https://docs.python.org/library/exceptions.html#UnicodeEncodeError
¶	https://docs.python.org/library/sys.html#sys.dont_write_bytecode
-B	https://docs.python.org/using/cmdline.html#cmdoption-B
PYTHONDONTWRITEBYTECODE	https://docs.python.org/using/cmdline.html#envvar-PYTHONDONTWRITEBYTECODE
¶	https://docs.python.org/library/sys.html#sys._emscripten_info
named tuple	https://docs.python.org/glossary.html#term-named-tuple
¶	https://docs.python.org/library/sys.html#sys._emscripten_info.emscripten_version
¶	https://docs.python.org/library/sys.html#sys._emscripten_info.runtime
¶	https://docs.python.org/library/sys.html#sys._emscripten_info.pthreads
¶	https://docs.python.org/library/sys.html#sys._emscripten_info.shared_memory
Availability	https://docs.python.org/library/intro.html#availability
¶	https://docs.python.org/library/sys.html#sys.pycache_prefix
compileall	https://docs.python.org/library/compileall.html#module-compileall
-X	https://docs.python.org/using/cmdline.html#cmdoption-X
PYTHONPYCACHEPREFIX	https://docs.python.org/using/cmdline.html#envvar-PYTHONPYCACHEPREFIX
¶	https://docs.python.org/library/sys.html#sys.excepthook
SystemExit	https://docs.python.org/library/exceptions.html#SystemExit
RuntimeError	https://docs.python.org/library/exceptions.html#RuntimeError
sys.unraisablehook()	https://docs.python.org/library/sys.html#sys.unraisablehook
threading.excepthook()	https://docs.python.org/library/threading.html#threading.excepthook
threading.Thread.run()	https://docs.python.org/library/threading.html#threading.Thread.run
¶	https://docs.python.org/library/sys.html#sys.__breakpointhook__
¶	https://docs.python.org/library/sys.html#sys.__displayhook__
¶	https://docs.python.org/library/sys.html#sys.__excepthook__
¶	https://docs.python.org/library/sys.html#sys.__unraisablehook__
¶	https://docs.python.org/library/sys.html#sys.exception
¶	https://docs.python.org/library/sys.html#sys.exc_info
exception()	https://docs.python.org/library/sys.html#sys.exception
exc_info()	https://docs.python.org/library/sys.html#sys.exc_info
BaseException	https://docs.python.org/library/exceptions.html#BaseException
traceback object	https://docs.python.org/reference/datamodel.html#traceback-objects
exc_info()	https://docs.python.org/library/sys.html#sys.exc_info
¶	https://docs.python.org/library/sys.html#sys.exec_prefix
virtual environment	https://docs.python.org/library/venv.html#venv-def
exec_prefix	https://docs.python.org/library/sys.html#sys.exec_prefix
base_exec_prefix	https://docs.python.org/library/sys.html#sys.base_exec_prefix
Virtual Environments	https://docs.python.org/library/sys_path_init.html#sys-path-init-virtual-environments
virtual environment	https://docs.python.org/library/venv.html#venv-def
prefix	https://docs.python.org/library/sys.html#sys.prefix
exec_prefix	https://docs.python.org/library/sys.html#sys.exec_prefix
path initialization	https://docs.python.org/library/sys_path_init.html#sys-path-init
site	https://docs.python.org/library/site.html#module-site
prefix	https://docs.python.org/library/sys.html#sys.prefix
exec_prefix	https://docs.python.org/library/sys.html#sys.exec_prefix
site	https://docs.python.org/library/site.html#module-site
-S	https://docs.python.org/using/cmdline.html#cmdoption-S
¶	https://docs.python.org/library/sys.html#sys.executable
sys.executable	https://docs.python.org/library/sys.html#sys.executable
¶	https://docs.python.org/library/sys.html#sys.exit
SystemExit	https://docs.python.org/library/exceptions.html#SystemExit
stderr	https://docs.python.org/library/sys.html#sys.stderr
exit()	https://docs.python.org/library/constants.html#exit
try	https://docs.python.org/reference/compound_stmts.html#try
SystemExit	https://docs.python.org/library/exceptions.html#SystemExit
¶	https://docs.python.org/library/sys.html#sys.flags
named tuple	https://docs.python.org/glossary.html#term-named-tuple
¶	https://docs.python.org/library/sys.html#sys.flags.debug
-d	https://docs.python.org/using/cmdline.html#cmdoption-d
¶	https://docs.python.org/library/sys.html#sys.flags.inspect
-i	https://docs.python.org/using/cmdline.html#cmdoption-i
¶	https://docs.python.org/library/sys.html#sys.flags.interactive
-i	https://docs.python.org/using/cmdline.html#cmdoption-i
¶	https://docs.python.org/library/sys.html#sys.flags.isolated
-I	https://docs.python.org/using/cmdline.html#cmdoption-I
¶	https://docs.python.org/library/sys.html#sys.flags.optimize
-O	https://docs.python.org/using/cmdline.html#cmdoption-O
-OO	https://docs.python.org/using/cmdline.html#cmdoption-OO
¶	https://docs.python.org/library/sys.html#sys.flags.dont_write_bytecode
-B	https://docs.python.org/using/cmdline.html#cmdoption-B
¶	https://docs.python.org/library/sys.html#sys.flags.no_user_site
-s	https://docs.python.org/using/cmdline.html#cmdoption-s
¶	https://docs.python.org/library/sys.html#sys.flags.no_site
-S	https://docs.python.org/using/cmdline.html#cmdoption-S
¶	https://docs.python.org/library/sys.html#sys.flags.ignore_environment
-E	https://docs.python.org/using/cmdline.html#cmdoption-E
¶	https://docs.python.org/library/sys.html#sys.flags.verbose
-v	https://docs.python.org/using/cmdline.html#cmdoption-v
¶	https://docs.python.org/library/sys.html#sys.flags.bytes_warning
-b	https://docs.python.org/using/cmdline.html#cmdoption-b
¶	https://docs.python.org/library/sys.html#sys.flags.quiet
-q	https://docs.python.org/using/cmdline.html#cmdoption-q
¶	https://docs.python.org/library/sys.html#sys.flags.hash_randomization
-R	https://docs.python.org/using/cmdline.html#cmdoption-R
¶	https://docs.python.org/library/sys.html#sys.flags.dev_mode
-X dev	https://docs.python.org/using/cmdline.html#cmdoption-X
Python Development Mode	https://docs.python.org/library/devmode.html#devmode
¶	https://docs.python.org/library/sys.html#sys.flags.utf8_mode
-X utf8	https://docs.python.org/using/cmdline.html#cmdoption-X
¶	https://docs.python.org/library/sys.html#sys.flags.safe_path
-P	https://docs.python.org/using/cmdline.html#cmdoption-P
¶	https://docs.python.org/library/sys.html#sys.flags.int_max_str_digits
-X int_max_str_digits	https://docs.python.org/using/cmdline.html#cmdoption-X
integer string conversion length limitation	https://docs.python.org/library/stdtypes.html#int-max-str-digits
¶	https://docs.python.org/library/sys.html#sys.flags.warn_default_encoding
-X warn_default_encoding	https://docs.python.org/using/cmdline.html#cmdoption-X
¶	https://docs.python.org/library/sys.html#sys.flags.gil
-X gil	https://docs.python.org/using/cmdline.html#cmdoption-X
PYTHON_GIL	https://docs.python.org/using/cmdline.html#envvar-PYTHON_GIL
¶	https://docs.python.org/library/sys.html#sys.flags.thread_inherit_context
-X thread_inherit_context	https://docs.python.org/using/cmdline.html#cmdoption-X
PYTHON_THREAD_INHERIT_CONTEXT	https://docs.python.org/using/cmdline.html#envvar-PYTHON_THREAD_INHERIT_CONTEXT
¶	https://docs.python.org/library/sys.html#sys.flags.context_aware_warnings
-X context_aware_warnings	https://docs.python.org/using/cmdline.html#cmdoption-X
PYTHON_CONTEXT_AWARE_WARNINGS	https://docs.python.org/using/cmdline.html#envvar-PYTHON_CONTEXT_AWARE_WARNINGS
-q	https://docs.python.org/using/cmdline.html#cmdoption-q
-I	https://docs.python.org/using/cmdline.html#cmdoption-I
Python Development Mode	https://docs.python.org/library/devmode.html#devmode
-X	https://docs.python.org/using/cmdline.html#cmdoption-X
-X	https://docs.python.org/using/cmdline.html#cmdoption-X
-P	https://docs.python.org/using/cmdline.html#cmdoption-P
¶	https://docs.python.org/library/sys.html#sys.float_info
named tuple	https://docs.python.org/glossary.html#term-named-tuple
[C99]	https://docs.python.org/library/sys.html#c99
named tuple	https://docs.python.org/glossary.html#term-named-tuple
¶	https://docs.python.org/library/sys.html#id2
¶	https://docs.python.org/library/sys.html#sys.float_info.epsilon
math.ulp()	https://docs.python.org/library/math.html#math.ulp
¶	https://docs.python.org/library/sys.html#sys.float_info.dig
¶	https://docs.python.org/library/sys.html#sys.float_info.mant_dig
¶	https://docs.python.org/library/sys.html#sys.float_info.max
¶	https://docs.python.org/library/sys.html#sys.float_info.max_exp
¶	https://docs.python.org/library/sys.html#sys.float_info.max_10_exp
¶	https://docs.python.org/library/sys.html#sys.float_info.min
math.ulp(0.0)	https://docs.python.org/library/math.html#math.ulp
¶	https://docs.python.org/library/sys.html#sys.float_info.min_exp
¶	https://docs.python.org/library/sys.html#sys.float_info.min_10_exp
¶	https://docs.python.org/library/sys.html#sys.float_info.radix
¶	https://docs.python.org/library/sys.html#sys.float_info.rounds
sys.float_info.dig	https://docs.python.org/library/sys.html#sys.float_info.dig
sys.float_info.dig	https://docs.python.org/library/sys.html#sys.float_info.dig
¶	https://docs.python.org/library/sys.html#sys.float_repr_style
repr()	https://docs.python.org/library/functions.html#repr
¶	https://docs.python.org/library/sys.html#sys.getallocatedblocks
_clear_internal_caches()	https://docs.python.org/library/sys.html#sys._clear_internal_caches
gc.collect()	https://docs.python.org/library/gc.html#gc.collect
getallocatedblocks()	https://docs.python.org/library/sys.html#sys.getallocatedblocks
¶	https://docs.python.org/library/sys.html#sys.getunicodeinternedsize
¶	https://docs.python.org/library/sys.html#sys.getandroidapilevel
platform.android_ver()	https://docs.python.org/library/platform.html#platform.android_ver
Availability	https://docs.python.org/library/intro.html#availability
¶	https://docs.python.org/library/sys.html#sys.getdefaultencoding
str.encode()	https://docs.python.org/library/stdtypes.html#str.encode
¶	https://docs.python.org/library/sys.html#sys.getdlopenflags
os	https://docs.python.org/library/os.html#module-os
os.RTLD_LAZY	https://docs.python.org/library/os.html#os.RTLD_LAZY
Availability	https://docs.python.org/library/intro.html#availability
¶	https://docs.python.org/library/sys.html#sys.getfilesystemencoding
filesystem encoding	https://docs.python.org/glossary.html#term-filesystem-encoding-and-error-handler
filesystem error handler	https://docs.python.org/glossary.html#term-filesystem-encoding-and-error-handler
getfilesystemencodeerrors()	https://docs.python.org/library/sys.html#sys.getfilesystemencodeerrors
os.fsencode()	https://docs.python.org/library/os.html#os.fsencode
os.fsdecode()	https://docs.python.org/library/os.html#os.fsdecode
filesystem encoding and error handler	https://docs.python.org/glossary.html#term-filesystem-encoding-and-error-handler
PyConfig_Read()	https://docs.python.org/c-api/init_config.html#c.PyConfig_Read
filesystem_encoding	https://docs.python.org/c-api/init_config.html#c.PyConfig.filesystem_encoding
filesystem_errors	https://docs.python.org/c-api/init_config.html#c.PyConfig.filesystem_errors
PyConfig	https://docs.python.org/c-api/init_config.html#c.PyConfig
getfilesystemencoding()	https://docs.python.org/library/sys.html#sys.getfilesystemencoding
PEP 529	https://peps.python.org/pep-0529/
_enablelegacywindowsfsencoding()	https://docs.python.org/library/sys.html#sys._enablelegacywindowsfsencoding
Python UTF-8 Mode	https://docs.python.org/library/os.html#utf8-mode
¶	https://docs.python.org/library/sys.html#sys.getfilesystemencodeerrors
filesystem error handler	https://docs.python.org/glossary.html#term-filesystem-encoding-and-error-handler
filesystem encoding	https://docs.python.org/glossary.html#term-filesystem-encoding-and-error-handler
getfilesystemencoding()	https://docs.python.org/library/sys.html#sys.getfilesystemencoding
os.fsencode()	https://docs.python.org/library/os.html#os.fsencode
os.fsdecode()	https://docs.python.org/library/os.html#os.fsdecode
filesystem encoding and error handler	https://docs.python.org/glossary.html#term-filesystem-encoding-and-error-handler
PyConfig_Read()	https://docs.python.org/c-api/init_config.html#c.PyConfig_Read
filesystem_encoding	https://docs.python.org/c-api/init_config.html#c.PyConfig.filesystem_encoding
filesystem_errors	https://docs.python.org/c-api/init_config.html#c.PyConfig.filesystem_errors
PyConfig	https://docs.python.org/c-api/init_config.html#c.PyConfig
¶	https://docs.python.org/library/sys.html#sys.get_int_max_str_digits
integer string conversion length limitation	https://docs.python.org/library/stdtypes.html#int-max-str-digits
set_int_max_str_digits()	https://docs.python.org/library/sys.html#sys.set_int_max_str_digits
¶	https://docs.python.org/library/sys.html#sys.getrefcount
getrefcount()	https://docs.python.org/library/sys.html#sys.getrefcount
immortal	https://docs.python.org/glossary.html#term-immortal
Immortal	https://docs.python.org/glossary.html#term-immortal
_is_immortal()	https://docs.python.org/library/sys.html#sys._is_immortal
¶	https://docs.python.org/library/sys.html#sys.getrecursionlimit
setrecursionlimit()	https://docs.python.org/library/sys.html#sys.setrecursionlimit
¶	https://docs.python.org/library/sys.html#sys.getsizeof
TypeError	https://docs.python.org/library/exceptions.html#TypeError
getsizeof()	https://docs.python.org/library/sys.html#sys.getsizeof
recursive sizeof recipe	https://code.activestate.com/recipes/577504-compute-memory-footprint-of-an-object-and-its-cont/
getsizeof()	https://docs.python.org/library/sys.html#sys.getsizeof
¶	https://docs.python.org/library/sys.html#sys.getswitchinterval
setswitchinterval()	https://docs.python.org/library/sys.html#sys.setswitchinterval
¶	https://docs.python.org/library/sys.html#sys._getframe
ValueError	https://docs.python.org/library/exceptions.html#ValueError
auditing event	https://docs.python.org/library/sys.html#auditing
¶	https://docs.python.org/library/sys.html#sys._getframemodulename
auditing event	https://docs.python.org/library/sys.html#auditing
¶	https://docs.python.org/library/sys.html#sys.getobjects
--with-trace-refs	https://docs.python.org/using/configure.html#cmdoption-with-trace-refs
PyInterpreterConfig.use_main_obmalloc	https://docs.python.org/c-api/init.html#c.PyInterpreterConfig.use_main_obmalloc
Py_NewInterpreter()	https://docs.python.org/c-api/init.html#c.Py_NewInterpreter
main interpreter	https://docs.python.org/c-api/init.html#sub-interpreter-support
¶	https://docs.python.org/library/sys.html#sys.getprofile
setprofile()	https://docs.python.org/library/sys.html#sys.setprofile
¶	https://docs.python.org/library/sys.html#sys.gettrace
settrace()	https://docs.python.org/library/sys.html#sys.settrace
gettrace()	https://docs.python.org/library/sys.html#sys.gettrace
¶	https://docs.python.org/library/sys.html#sys.getwindowsversion
platform	https://docs.python.org/library/platform.html#module-platform
Availability	https://docs.python.org/library/intro.html#availability
¶	https://docs.python.org/library/sys.html#sys.get_asyncgen_hooks
namedtuple	https://docs.python.org/library/collections.html#collections.namedtuple
asynchronous generator iterator	https://docs.python.org/glossary.html#term-asynchronous-generator-iterator
PEP 525	https://peps.python.org/pep-0525/
PEP 411	https://peps.python.org/pep-0411/
¶	https://docs.python.org/library/sys.html#sys.get_coroutine_origin_tracking_depth
set_coroutine_origin_tracking_depth()	https://docs.python.org/library/sys.html#sys.set_coroutine_origin_tracking_depth
PEP 411	https://peps.python.org/pep-0411/
¶	https://docs.python.org/library/sys.html#sys.hash_info
named tuple	https://docs.python.org/glossary.html#term-named-tuple
Hashing of numeric types	https://docs.python.org/library/stdtypes.html#numeric-hash
¶	https://docs.python.org/library/sys.html#sys.hash_info.width
¶	https://docs.python.org/library/sys.html#sys.hash_info.modulus
¶	https://docs.python.org/library/sys.html#sys.hash_info.inf
¶	https://docs.python.org/library/sys.html#sys.hash_info.nan
¶	https://docs.python.org/library/sys.html#sys.hash_info.imag
¶	https://docs.python.org/library/sys.html#sys.hash_info.algorithm
¶	https://docs.python.org/library/sys.html#sys.hash_info.hash_bits
¶	https://docs.python.org/library/sys.html#sys.hash_info.seed_bits
¶	https://docs.python.org/library/sys.html#sys.hash_info.cutoff
¶	https://docs.python.org/library/sys.html#sys.hexversion
hex()	https://docs.python.org/library/functions.html#hex
named tuple	https://docs.python.org/glossary.html#term-named-tuple
sys.version_info	https://docs.python.org/library/sys.html#sys.version_info
API and ABI Versioning	https://docs.python.org/c-api/apiabiversion.html#apiabiversion
¶	https://docs.python.org/library/sys.html#sys.implementation
sys.version_info	https://docs.python.org/library/sys.html#sys.version_info
sys.hexversion	https://docs.python.org/library/sys.html#sys.hexversion
PEP 684	https://peps.python.org/pep-0684/
PEP 734	https://peps.python.org/pep-0734/
concurrent.interpreters	https://docs.python.org/library/concurrent.interpreters.html#module-concurrent.interpreters
sys.implementation	https://docs.python.org/library/sys.html#sys.implementation
sys.implementation	https://docs.python.org/library/sys.html#sys.implementation
PEP 421	https://peps.python.org/pep-0421/
PEP 421	https://peps.python.org/pep-0421/
¶	https://docs.python.org/library/sys.html#sys.int_info
named tuple	https://docs.python.org/glossary.html#term-named-tuple
¶	https://docs.python.org/library/sys.html#sys.int_info.bits_per_digit
¶	https://docs.python.org/library/sys.html#sys.int_info.sizeof_digit
¶	https://docs.python.org/library/sys.html#sys.int_info.default_max_str_digits
sys.get_int_max_str_digits()	https://docs.python.org/library/sys.html#sys.get_int_max_str_digits
¶	https://docs.python.org/library/sys.html#sys.int_info.str_digits_check_threshold
sys.set_int_max_str_digits()	https://docs.python.org/library/sys.html#sys.set_int_max_str_digits
PYTHONINTMAXSTRDIGITS	https://docs.python.org/using/cmdline.html#envvar-PYTHONINTMAXSTRDIGITS
-X int_max_str_digits	https://docs.python.org/using/cmdline.html#cmdoption-X
default_max_str_digits	https://docs.python.org/library/sys.html#sys.int_info.default_max_str_digits
str_digits_check_threshold	https://docs.python.org/library/sys.html#sys.int_info.str_digits_check_threshold
¶	https://docs.python.org/library/sys.html#sys.__interactivehook__
interactive mode	https://docs.python.org/tutorial/interpreter.html#tut-interactive
PYTHONSTARTUP	https://docs.python.org/using/cmdline.html#envvar-PYTHONSTARTUP
site	https://docs.python.org/library/site.html#module-site
sets this	https://docs.python.org/library/site.html#rlcompleter-config
auditing event	https://docs.python.org/library/sys.html#auditing
¶	https://docs.python.org/library/sys.html#sys.intern
immortal	https://docs.python.org/glossary.html#term-immortal
intern()	https://docs.python.org/library/sys.html#sys.intern
¶	https://docs.python.org/library/sys.html#sys._is_gil_enabled
True	https://docs.python.org/library/constants.html#True
GIL	https://docs.python.org/glossary.html#term-GIL
False	https://docs.python.org/library/constants.html#False
¶	https://docs.python.org/library/sys.html#sys.is_finalizing
True	https://docs.python.org/library/constants.html#True
shutting down	https://docs.python.org/glossary.html#term-interpreter-shutdown
False	https://docs.python.org/library/constants.html#False
PythonFinalizationError	https://docs.python.org/library/exceptions.html#PythonFinalizationError
¶	https://docs.python.org/library/sys.html#sys._jit
¶	https://docs.python.org/library/sys.html#sys._jit.is_available
--enable-experimental-jit	https://docs.python.org/using/configure.html#cmdoption-enable-experimental-jit
¶	https://docs.python.org/library/sys.html#sys._jit.is_enabled
sys._jit.is_available()	https://docs.python.org/library/sys.html#sys._jit.is_available
PYTHON_JIT	https://docs.python.org/using/cmdline.html#envvar-PYTHON_JIT
¶	https://docs.python.org/library/sys.html#sys._jit.is_active
sys._jit.is_enabled()	https://docs.python.org/library/sys.html#sys._jit.is_enabled
¶	https://docs.python.org/library/sys.html#sys.last_exc
pdb	https://docs.python.org/library/pdb.html#module-pdb
¶	https://docs.python.org/library/sys.html#sys._is_immortal
True	https://docs.python.org/library/constants.html#True
immortal	https://docs.python.org/glossary.html#term-immortal
False	https://docs.python.org/library/constants.html#False
¶	https://docs.python.org/library/sys.html#sys._is_interned
True	https://docs.python.org/library/constants.html#True
False	https://docs.python.org/library/constants.html#False
¶	https://docs.python.org/library/sys.html#sys.last_type
¶	https://docs.python.org/library/sys.html#sys.last_value
¶	https://docs.python.org/library/sys.html#sys.last_traceback
sys.last_exc	https://docs.python.org/library/sys.html#sys.last_exc
exc_info()	https://docs.python.org/library/sys.html#sys.exc_info
¶	https://docs.python.org/library/sys.html#sys.maxsize
Py_ssize_t	https://docs.python.org/c-api/intro.html#c.Py_ssize_t
¶	https://docs.python.org/library/sys.html#sys.maxunicode
PEP 393	https://peps.python.org/pep-0393/
¶	https://docs.python.org/library/sys.html#sys.meta_path
meta path finder	https://docs.python.org/glossary.html#term-meta-path-finder
find_spec()	https://docs.python.org/library/importlib.html#importlib.abc.MetaPathFinder.find_spec
find_spec()	https://docs.python.org/library/importlib.html#importlib.abc.MetaPathFinder.find_spec
__path__	https://docs.python.org/reference/datamodel.html#module.__path__
module spec	https://docs.python.org/glossary.html#term-module-spec
importlib.abc.MetaPathFinder	https://docs.python.org/library/importlib.html#importlib.abc.MetaPathFinder
meta_path	https://docs.python.org/library/sys.html#sys.meta_path
importlib.machinery.ModuleSpec	https://docs.python.org/library/importlib.html#importlib.machinery.ModuleSpec
find_spec()	https://docs.python.org/library/importlib.html#importlib.abc.MetaPathFinder.find_spec
Module specs	https://docs.python.org/glossary.html#term-module-spec
PEP 451	https://peps.python.org/pep-0451/
meta_path	https://docs.python.org/library/sys.html#sys.meta_path
find_spec()	https://docs.python.org/library/importlib.html#importlib.abc.MetaPathFinder.find_spec
¶	https://docs.python.org/library/sys.html#sys.modules
¶	https://docs.python.org/library/sys.html#sys.orig_argv
sys.orig_argv	https://docs.python.org/library/sys.html#sys.orig_argv
sys.argv	https://docs.python.org/library/sys.html#sys.argv
sys.orig_argv	https://docs.python.org/library/sys.html#sys.orig_argv
sys.argv	https://docs.python.org/library/sys.html#sys.argv
¶	https://docs.python.org/library/sys.html#sys.path
PYTHONPATH	https://docs.python.org/using/cmdline.html#envvar-PYTHONPATH
sys.path	https://docs.python.org/library/sys.html#sys.path
PYTHONPATH	https://docs.python.org/using/cmdline.html#envvar-PYTHONPATH
-P	https://docs.python.org/using/cmdline.html#cmdoption-P
PYTHONSAFEPATH	https://docs.python.org/using/cmdline.html#envvar-PYTHONSAFEPATH
sys.path	https://docs.python.org/library/sys.html#sys.path
site	https://docs.python.org/library/site.html#module-site
sys.path	https://docs.python.org/library/sys.html#sys.path
¶	https://docs.python.org/library/sys.html#sys.path_hooks
finder	https://docs.python.org/glossary.html#term-finder
ImportError	https://docs.python.org/library/exceptions.html#ImportError
PEP 302	https://peps.python.org/pep-0302/
¶	https://docs.python.org/library/sys.html#sys.path_importer_cache
finder	https://docs.python.org/glossary.html#term-finder
sys.path_hooks	https://docs.python.org/library/sys.html#sys.path_hooks
sys.path_hooks	https://docs.python.org/library/sys.html#sys.path_hooks
PEP 302	https://peps.python.org/pep-0302/
¶	https://docs.python.org/library/sys.html#sys.platform
sys.platform	https://docs.python.org/library/sys.html#sys.platform
sys.platform	https://docs.python.org/library/sys.html#sys.platform
sys.platform	https://docs.python.org/library/sys.html#sys.platform
sys.platform	https://docs.python.org/library/sys.html#sys.platform
os.name	https://docs.python.org/library/os.html#os.name
os.uname()	https://docs.python.org/library/os.html#os.uname
platform	https://docs.python.org/library/platform.html#module-platform
¶	https://docs.python.org/library/sys.html#sys.platlibdir
os	https://docs.python.org/library/os.html#module-os
errno	https://docs.python.org/library/errno.html#module-errno
sys.platlibdir	https://docs.python.org/library/sys.html#sys.platlibdir
¶	https://docs.python.org/library/sys.html#sys.prefix
--prefix	https://docs.python.org/using/configure.html#cmdoption-prefix
Installation paths	https://docs.python.org/library/sysconfig.html#installation-paths
virtual environment	https://docs.python.org/library/venv.html#venv-def
prefix	https://docs.python.org/library/sys.html#sys.prefix
base_prefix	https://docs.python.org/library/sys.html#sys.base_prefix
Virtual Environments	https://docs.python.org/library/sys_path_init.html#sys-path-init-virtual-environments
virtual environment	https://docs.python.org/library/venv.html#venv-def
prefix	https://docs.python.org/library/sys.html#sys.prefix
exec_prefix	https://docs.python.org/library/sys.html#sys.exec_prefix
path initialization	https://docs.python.org/library/sys_path_init.html#sys-path-init
site	https://docs.python.org/library/site.html#module-site
prefix	https://docs.python.org/library/sys.html#sys.prefix
exec_prefix	https://docs.python.org/library/sys.html#sys.exec_prefix
site	https://docs.python.org/library/site.html#module-site
-S	https://docs.python.org/using/cmdline.html#cmdoption-S
¶	https://docs.python.org/library/sys.html#sys.ps1
¶	https://docs.python.org/library/sys.html#sys.ps2
str()	https://docs.python.org/library/stdtypes.html#str
¶	https://docs.python.org/library/sys.html#sys.setdlopenflags
os	https://docs.python.org/library/os.html#module-os
os.RTLD_LAZY	https://docs.python.org/library/os.html#os.RTLD_LAZY
Availability	https://docs.python.org/library/intro.html#availability
¶	https://docs.python.org/library/sys.html#sys.set_int_max_str_digits
integer string conversion length limitation	https://docs.python.org/library/stdtypes.html#int-max-str-digits
get_int_max_str_digits()	https://docs.python.org/library/sys.html#sys.get_int_max_str_digits
¶	https://docs.python.org/library/sys.html#sys.setprofile
The Python Profilers	https://docs.python.org/library/profile.html#profile
settrace()	https://docs.python.org/library/sys.html#sys.settrace
settrace()	https://docs.python.org/library/sys.html#sys.settrace
call_tracing()	https://docs.python.org/library/sys.html#sys.call_tracing
auditing event	https://docs.python.org/library/sys.html#auditing
¶	https://docs.python.org/library/sys.html#sys.setrecursionlimit
RecursionError	https://docs.python.org/library/exceptions.html#RecursionError
RecursionError	https://docs.python.org/library/exceptions.html#RecursionError
¶	https://docs.python.org/library/sys.html#sys.setswitchinterval
¶	https://docs.python.org/library/sys.html#sys.settrace
settrace()	https://docs.python.org/library/sys.html#sys.settrace
threading.settrace()	https://docs.python.org/library/threading.html#threading.settrace
current stack frame	https://docs.python.org/reference/datamodel.html#frame-objects
call_tracing()	https://docs.python.org/library/sys.html#sys.call_tracing
f_trace_lines	https://docs.python.org/reference/datamodel.html#frame.f_trace_lines
False	https://docs.python.org/library/constants.html#False
frame	https://docs.python.org/reference/datamodel.html#frame-objects
dis	https://docs.python.org/library/dis.html#module-dis
f_trace_opcodes	https://docs.python.org/reference/datamodel.html#frame.f_trace_opcodes
True	https://docs.python.org/library/constants.html#True
frame	https://docs.python.org/reference/datamodel.html#frame-objects
settrace()	https://docs.python.org/library/sys.html#sys.settrace
settrace()	https://docs.python.org/library/sys.html#sys.settrace
The standard type hierarchy	https://docs.python.org/reference/datamodel.html#types
auditing event	https://docs.python.org/library/sys.html#auditing
settrace()	https://docs.python.org/library/sys.html#sys.settrace
f_trace_lines	https://docs.python.org/reference/datamodel.html#frame.f_trace_lines
f_trace_opcodes	https://docs.python.org/reference/datamodel.html#frame.f_trace_opcodes
¶	https://docs.python.org/library/sys.html#sys.set_asyncgen_hooks
asynchronous generator iterator	https://docs.python.org/glossary.html#term-asynchronous-generator-iterator
auditing event	https://docs.python.org/library/sys.html#auditing
auditing event	https://docs.python.org/library/sys.html#auditing
PEP 525	https://peps.python.org/pep-0525/
Lib/asyncio/base_events.py	https://github.com/python/cpython/tree/3.14/Lib/asyncio/base_events.py
PEP 411	https://peps.python.org/pep-0411/
¶	https://docs.python.org/library/sys.html#sys.set_coroutine_origin_tracking_depth
PEP 411	https://peps.python.org/pep-0411/
¶	https://docs.python.org/library/sys.html#sys.activate_stack_trampoline
Availability	https://docs.python.org/library/intro.html#availability
Python support for the Linux perf profiler	https://docs.python.org/howto/perf_profiling.html#perf-profiling
https://perf.wiki.kernel.org	https://perf.wiki.kernel.org
¶	https://docs.python.org/library/sys.html#sys.deactivate_stack_trampoline
Availability	https://docs.python.org/library/intro.html#availability
¶	https://docs.python.org/library/sys.html#sys.is_stack_trampoline_active
Availability	https://docs.python.org/library/intro.html#availability
¶	https://docs.python.org/library/sys.html#sys.remote_exec
auditing event	https://docs.python.org/library/sys.html#auditing
sys.remote_exec()	https://docs.python.org/library/sys.html#sys.remote_exec
auditing event	https://docs.python.org/library/sys.html#auditing
sys.remote_exec()	https://docs.python.org/library/sys.html#sys.remote_exec
Availability	https://docs.python.org/library/intro.html#availability
¶	https://docs.python.org/library/sys.html#sys._enablelegacywindowsfsencoding
filesystem encoding and error handler	https://docs.python.org/glossary.html#term-filesystem-encoding-and-error-handler
PYTHONLEGACYWINDOWSFSENCODING	https://docs.python.org/using/cmdline.html#envvar-PYTHONLEGACYWINDOWSFSENCODING
sys.getfilesystemencoding()	https://docs.python.org/library/sys.html#sys.getfilesystemencoding
sys.getfilesystemencodeerrors()	https://docs.python.org/library/sys.html#sys.getfilesystemencodeerrors
Availability	https://docs.python.org/library/intro.html#availability
PYTHONLEGACYWINDOWSFSENCODING	https://docs.python.org/using/cmdline.html#envvar-PYTHONLEGACYWINDOWSFSENCODING
PEP 529	https://peps.python.org/pep-0529/
PYTHONLEGACYWINDOWSFSENCODING	https://docs.python.org/using/cmdline.html#envvar-PYTHONLEGACYWINDOWSFSENCODING
¶	https://docs.python.org/library/sys.html#sys.stdin
¶	https://docs.python.org/library/sys.html#sys.stdout
¶	https://docs.python.org/library/sys.html#sys.stderr
File objects	https://docs.python.org/glossary.html#term-file-object
input()	https://docs.python.org/library/functions.html#input
print()	https://docs.python.org/library/functions.html#print
expression	https://docs.python.org/glossary.html#term-expression
input()	https://docs.python.org/library/functions.html#input
text files	https://docs.python.org/glossary.html#term-text-file
open()	https://docs.python.org/library/functions.html#open
PyConfig.stdio_encoding	https://docs.python.org/c-api/init_config.html#c.PyConfig.stdio_encoding
PyConfig.stdio_errors	https://docs.python.org/c-api/init_config.html#c.PyConfig.stdio_errors
locale encoding	https://docs.python.org/glossary.html#term-locale-encoding
PYTHONIOENCODING	https://docs.python.org/using/cmdline.html#envvar-PYTHONIOENCODING
-X	https://docs.python.org/using/cmdline.html#cmdoption-X
PYTHONUTF8	https://docs.python.org/using/cmdline.html#envvar-PYTHONUTF8
PYTHONLEGACYWINDOWSSTDIO	https://docs.python.org/using/cmdline.html#envvar-PYTHONLEGACYWINDOWSSTDIO
-u	https://docs.python.org/using/cmdline.html#cmdoption-u
PYTHONUNBUFFERED	https://docs.python.org/using/cmdline.html#envvar-PYTHONUNBUFFERED
buffer	https://docs.python.org/library/io.html#io.TextIOBase.buffer
stdout	https://docs.python.org/library/sys.html#sys.stdout
io.StringIO	https://docs.python.org/library/io.html#io.StringIO
¶	https://docs.python.org/library/sys.html#sys.__stdin__
¶	https://docs.python.org/library/sys.html#sys.__stdout__
¶	https://docs.python.org/library/sys.html#sys.__stderr__
¶	https://docs.python.org/library/sys.html#sys.stdlib_module_names
sys.builtin_module_names	https://docs.python.org/library/sys.html#sys.builtin_module_names
¶	https://docs.python.org/library/sys.html#sys.thread_info
named tuple	https://docs.python.org/glossary.html#term-named-tuple
¶	https://docs.python.org/library/sys.html#sys.thread_info.name
¶	https://docs.python.org/library/sys.html#sys.thread_info.lock
¶	https://docs.python.org/library/sys.html#sys.thread_info.version
¶	https://docs.python.org/library/sys.html#sys.tracebacklimit
¶	https://docs.python.org/library/sys.html#sys.unraisablehook
gc.collect()	https://docs.python.org/library/gc.html#gc.collect
sys.unraisablehook()	https://docs.python.org/library/sys.html#sys.unraisablehook
excepthook()	https://docs.python.org/library/sys.html#sys.excepthook
¶	https://docs.python.org/library/sys.html#sys.version
version_info	https://docs.python.org/library/sys.html#sys.version_info
platform	https://docs.python.org/library/platform.html#module-platform
¶	https://docs.python.org/library/sys.html#sys.api_version
PYTHON_API_VERSION	https://docs.python.org/c-api/module.html#c.PYTHON_API_VERSION
¶	https://docs.python.org/library/sys.html#sys.version_info
¶	https://docs.python.org/library/sys.html#sys.warnoptions
warnings	https://docs.python.org/library/warnings.html#module-warnings
¶	https://docs.python.org/library/sys.html#sys.winver
sys	https://docs.python.org/library/sys.html#module-sys
Availability	https://docs.python.org/library/intro.html#availability
sys.monitoring	https://docs.python.org/library/sys.monitoring.html#module-sys.monitoring
¶	https://docs.python.org/library/sys.html#sys._xoptions
-X	https://docs.python.org/using/cmdline.html#cmdoption-X
True	https://docs.python.org/library/constants.html#True
-X	https://docs.python.org/using/cmdline.html#cmdoption-X
C99	https://docs.python.org/library/sys.html#id1
https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf	https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf
Python Runtime Services	https://docs.python.org/library/python.html
sys.monitoring — Execution event monitoring	https://docs.python.org/library/sys.monitoring.html
Report a bug	https://docs.python.org/bugs.html
Show source	https://github.com/python/cpython/blob/main/Doc/library/sys.rst?plain=1
index	https://docs.python.org/genindex.html
modules	https://docs.python.org/py-modindex.html
next	https://docs.python.org/library/sys.monitoring.html
previous	https://docs.python.org/library/python.html
Python	https://www.python.org/
3.14.2 Documentation	https://docs.python.org/index.html
The Python Standard Library	https://docs.python.org/library/index.html
Python Runtime Services	https://docs.python.org/library/python.html
sys — System-specific parameters and functions	https://docs.python.org/library/sys.html
Copyright	https://docs.python.org/copyright.html
History and License	https://docs.python.org/license.html
Please donate.	https://www.python.org/psf/donations/
Found a bug	https://docs.python.org/bugs.html
Sphinx	https://www.sphinx-doc.org/

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