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Python manpage diff
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| --- a/python.html 2026-06-02 13:19:49.999126056 -0400 | |
| +++ b/python.html 2026-06-03 19:23:06.475785985 -0400 | |
| @@ -1,5 +1,5 @@ | |
| <!-- Creator : groff version 1.24.1 --> | |
| -<!-- CreationDate: Tue Jun 2 13:19:49 2026 --> | |
| +<!-- CreationDate: Wed Jun 3 19:23:06 2026 --> | |
| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" | |
| "http://www.w3.org/TR/html4/loose.dtd"> | |
| <html> | |
| @@ -168,7 +168,8 @@ | |
| the interpreter.</p></td></tr> | |
| </table> | |
| -<p style="margin-left:6%;"><b>-h , -? , --help</b></p> | |
| +<p style="margin-left:6%;"><b>-h</b>, <b>-?</b>, | |
| +<b>--help</b></p> | |
| <p style="margin-left:15%;">Prints the usage for the | |
| interpreter executable and exits.</p> | |
| @@ -361,7 +362,7 @@ | |
| cleanup at exit.</p></td></tr> | |
| </table> | |
| -<p style="margin-left:6%;"><b>-V , --version</b></p> | |
| +<p style="margin-left:6%;"><b>-V</b>, <b>--version</b></p> | |
| <p style="margin-left:15%;">Prints the Python version | |
| number of the executable and exits. When given twice, print | |
| @@ -376,25 +377,58 @@ | |
| <p style="margin-left:15%; margin-top: 1em">The simplest | |
| settings apply a particular action unconditionally to all | |
| warnings emitted by a process (even those that are otherwise | |
| -ignored by default):</p> | |
| +ignored by default): <b><br> | |
| +-Wdefault</b></p> | |
| -<p style="margin-left:15%; margin-top: 1em">-Wdefault # | |
| -Warn once per call location <br> | |
| --Werror # Convert to exceptions <br> | |
| --Walways # Warn every time <br> | |
| --Wall # Same as -Walways <br> | |
| --Wmodule # Warn once per calling module <br> | |
| --Wonce # Warn once per Python process <br> | |
| --Wignore # Never warn</p> | |
| +<p style="margin-left:24%;">Warn once per call location</p> | |
| + | |
| +<p style="margin-left:15%;"><b>-Werror</b></p> | |
| + | |
| +<p style="margin-left:24%;">Convert to exceptions</p> | |
| + | |
| +<p style="margin-left:15%;"><b>-Walways</b></p> | |
| + | |
| +<p style="margin-left:24%;">Warn every time</p> | |
| + | |
| +<table width="100%" border="0" rules="none" frame="void" | |
| + cellspacing="0" cellpadding="0"> | |
| +<tr valign="top" align="left"> | |
| +<td width="15%"></td> | |
| +<td width="6%"> | |
| + | |
| + | |
| +<p><b>-Wall</b></p></td> | |
| +<td width="3%"></td> | |
| +<td width="20%"> | |
| + | |
| + | |
| +<p>Same as -Walways</p></td> | |
| +<td width="56%"> | |
| +</td></tr> | |
| +</table> | |
| + | |
| +<p style="margin-left:15%;"><b>-Wmodule</b></p> | |
| + | |
| +<p style="margin-left:24%;">Warn once per calling | |
| +module</p> | |
| + | |
| +<p style="margin-left:15%;"><b>-Wonce</b></p> | |
| + | |
| +<p style="margin-left:24%;">Warn once per Python | |
| +process</p> | |
| + | |
| +<p style="margin-left:15%;"><b>-Wignore</b></p> | |
| + | |
| +<p style="margin-left:24%;">Never warn</p> | |
| <p style="margin-left:15%; margin-top: 1em">The action | |
| names can be abbreviated as desired and the interpreter will | |
| resolve them to the appropriate action name. For example, | |
| -<b>-Wi</b> is the same as <b>-Wignore .</b></p> | |
| +<b>-Wi</b> is the same as <b>-Wignore</b>.</p> | |
| <p style="margin-left:15%; margin-top: 1em">The full form | |
| of argument is: | |
| -<i>action:message:category:module:lineno</i></p> | |
| +<i>action</i><b>:</b><i>message</i><b>:</b><i>category</i><b>:</b><i>module</i><b>:</b><i>lineno</i></p> | |
| <p style="margin-left:15%; margin-top: 1em">Empty fields | |
| match all values; trailing empty fields may be omitted. For | |
| @@ -679,7 +713,7 @@ | |
| to be able to access it). If no script name is given, | |
| <i>sys.argv[0]</i> is an empty string; if <b>-c</b> is used, | |
| <i>sys.argv[0]</i> contains the string | |
| -<i>’-c’.</i> Note that options interpreted by | |
| +’<i>-c</i>’. Note that options interpreted by | |
| the Python interpreter itself are not placed in | |
| <i>sys.argv</i>.</p> | |
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| --- a/python.txt 2026-06-02 13:19:43.563083013 -0400 | |
| +++ b/python.txt 2026-06-03 19:23:01.747826013 -0400 | |
| @@ -51,7 +51,7 @@ | |
| --EE Ignore environment variables like PYTHONPATH and PYTHONHOME that | |
| modify the behavior of the interpreter. | |
| - --hh ,, --?? ,, ----hheellpp | |
| + --hh, --??, ----hheellpp | |
| Prints the usage for the interpreter executable and exits. | |
| ----hheellpp--eennvv | |
| @@ -113,7 +113,7 @@ | |
| searching for a module. Also provides information on module cleanup | |
| at exit. | |
| - --VV ,, ----vveerrssiioonn | |
| + --VV, ----vveerrssiioonn | |
| Prints the Python version number of the executable and exits. When | |
| given twice, print more information about the build. | |
| @@ -126,19 +126,31 @@ | |
| all warnings emitted by a process (even those that are otherwise ig‐ | |
| nored by default): | |
| - -Wdefault # Warn once per call location | |
| - -Werror # Convert to exceptions | |
| - -Walways # Warn every time | |
| - -Wall # Same as -Walways | |
| - -Wmodule # Warn once per calling module | |
| - -Wonce # Warn once per Python process | |
| - -Wignore # Never warn | |
| + --WWddeeffaauulltt | |
| + Warn once per call location | |
| + | |
| + --WWeerrrroorr | |
| + Convert to exceptions | |
| + | |
| + --WWaallwwaayyss | |
| + Warn every time | |
| + | |
| + --WWaallll Same as -Walways | |
| + | |
| + --WWmmoodduullee | |
| + Warn once per calling module | |
| + | |
| + --WWoonnccee | |
| + Warn once per Python process | |
| + | |
| + --WWiiggnnoorree | |
| + Never warn | |
| The action names can be abbreviated as desired and the interpreter | |
| will resolve them to the appropriate action name. For example, --WWii | |
| - is the same as --WWiiggnnoorree .. | |
| + is the same as --WWiiggnnoorree. | |
| - The full form of argument is: _a_c_t_i_o_n_:_m_e_s_s_a_g_e_:_c_a_t_e_g_o_r_y_:_m_o_d_u_l_e_:_l_i_n_e_n_o | |
| + The full form of argument is: _a_c_t_i_o_n::_m_e_s_s_a_g_e::_c_a_t_e_g_o_r_y::_m_o_d_u_l_e::_l_i_n_e_n_o | |
| Empty fields match all values; trailing empty fields may be omitted. | |
| For example --WW iiggnnoorree::::DDeepprreeccaattiioonnWWaarrnniinngg ignores all Deprecation‐ | |
| @@ -291,7 +303,7 @@ | |
| passed to the script in the Python variable _s_y_s_._a_r_g_v, which is a list of | |
| strings (you must first _i_m_p_o_r_t _s_y_s to be able to access it). If no script | |
| name is given, _s_y_s_._a_r_g_v_[_0_] is an empty string; if --cc is used, _s_y_s_._a_r_g_v_[_0_] | |
| - contains the string _'_-_c_'_. Note that options interpreted by the Python in‐ | |
| + contains the string '_-_c'. Note that options interpreted by the Python in‐ | |
| terpreter itself are not placed in _s_y_s_._a_r_g_v. | |
| In interactive mode, the primary prompt is `>>>'; the second prompt (which | |
| @@ -591,12 +603,12 @@ | |
| The Python Software Foundation: https://www.python.org/psf/ | |
| IINNTTEERRNNEETT RREESSOOUURRCCEESS | |
| - Main website: https://www.python.org/ | |
| - Documentation: https://docs.python.org/ | |
| - Developer resources: https://devguide.python.org/ | |
| - Downloads: https://www.python.org/downloads/ | |
| - Module repository: https://pypi.org/ | |
| - Newsgroups: comp.lang.python, comp.lang.python.announce | |
| + Main website: https://www.python.org/ | |
| + Documentation: https://docs.python.org/ | |
| + Developer resources: https://devguide.python.org/ | |
| + Downloads: https://www.python.org/downloads/ | |
| + Module repository: https://pypi.org/ | |
| + Newsgroups: comp.lang.python, comp.lang.python.announce | |
| LLIICCEENNSSIINNGG | |
| Python is distributed under an Open Source license. See the file "LICENSE" |
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| _P_Y_T_H_O_N(1) General Commands Manual _P_Y_T_H_O_N(1) | |
| NNAAMMEE | |
| python - an interpreted, interactive, object-oriented programming language | |
| SSYYNNOOPPSSIISS | |
| ppyytthhoonn [ --BB ] [ --bb ] [ --dd ] [ --EE ] [ --hh ] [ --ii ] [ --II ] | |
| [ --mm _m_o_d_u_l_e_-_n_a_m_e ] [ --qq ] [ --RR ] [ --OO ] [ --OOOO ] [ --PP ] [ --ss ] [ --SS ] | |
| [ --uu ] | |
| [ --vv ] [ --VV ] [ --WW _a_r_g_u_m_e_n_t ] [ --xx ] [ --XX _o_p_t_i_o_n ] [ --?? ] | |
| [ ----cchheecckk--hhaasshh--bbaasseedd--ppyyccss _d_e_f_a_u_l_t | _a_l_w_a_y_s | _n_e_v_e_r ] | |
| [ ----hheellpp ] [ ----hheellpp--eennvv ] [ ----hheellpp--xxooppttiioonnss ] [ ----hheellpp--aallll ] | |
| [ --cc _c_o_m_m_a_n_d | _s_c_r_i_p_t | - ] [ _a_r_g_u_m_e_n_t_s ] | |
| DDEESSCCRRIIPPTTIIOONN | |
| Python is an interpreted, interactive, object-oriented programming language | |
| that combines remarkable power with very clear syntax. For an introduction | |
| to programming in Python, see the Python Tutorial. The Python Library Ref‐ | |
| erence documents built-in and standard types, constants, functions and mod‐ | |
| ules. Finally, the Python Reference Manual describes the syntax and seman‐ | |
| tics of the core language in (perhaps too) much detail. (These documents | |
| may be located via the IINNTTEERRNNEETT RREESSOOUURRCCEESS below; they may be installed on | |
| your system as well.) | |
| Python's basic power can be extended with your own modules written in C or | |
| C++. On most systems such modules may be dynamically loaded. Python is | |
| also adaptable as an extension language for existing applications. See the | |
| internal documentation for hints. | |
| Documentation for installed Python modules and packages can be viewed by | |
| running the ppyyddoocc program. | |
| CCOOMMMMAANNDD LLIINNEE OOPPTTIIOONNSS | |
| --BB Don't write _._p_y_c files on import. See also PYTHONDONTWRITEBYTECODE. | |
| --bb Issue warnings about str(bytes_instance), str(bytearray_instance) | |
| and comparing bytes/bytearray with str. (-bb: issue errors) | |
| --cc _c_o_m_m_a_n_d | |
| Specify the command to execute (see next section). This terminates | |
| the option list (following options are passed as arguments to the | |
| command). | |
| ----cchheecckk--hhaasshh--bbaasseedd--ppyyccss _m_o_d_e | |
| Configure how Python evaluates the up-to-dateness of hash-based .pyc | |
| files. | |
| --dd Turn on parser debugging output (for expert only, depending on com‐ | |
| pilation options). | |
| --EE Ignore environment variables like PYTHONPATH and PYTHONHOME that | |
| modify the behavior of the interpreter. | |
| [---hh ,, --?? ,,-] | |
| {+--hh, --??,+} ----hheellpp | |
| Prints the usage for the interpreter executable and exits. | |
| ----hheellpp--eennvv | |
| Prints help about Python-specific environment variables and exits. | |
| ----hheellpp--xxooppttiioonnss | |
| Prints help about implementation-specific --XX options and exits. | |
| ----hheellpp--aallll | |
| Prints complete usage information and exits. | |
| --ii When a script is passed as first argument or the --cc option is used, | |
| enter interactive mode after executing the script or the command. | |
| It does not read the $PYTHONSTARTUP file. This can be useful to in‐ | |
| spect global variables or a stack trace when a script raises an ex‐ | |
| ception. | |
| --II Run Python in isolated mode. This also implies --EE, --PP and --ss. In | |
| isolated mode sys.path contains neither the script's directory nor | |
| the user's site-packages directory. All PYTHON* environment vari‐ | |
| ables are ignored, too. Further restrictions may be imposed to pre‐ | |
| vent the user from injecting malicious code. | |
| --mm _m_o_d_u_l_e_-_n_a_m_e | |
| Searches _s_y_s_._p_a_t_h for the named module and runs the corresponding | |
| _._p_y file as a script. This terminates the option list (following op‐ | |
| tions are passed as arguments to the module). | |
| --OO Remove assert statements and any code conditional on the value of | |
| __debug__; augment the filename for compiled (bytecode) files by | |
| adding .opt-1 before the .pyc extension. | |
| --OOOO Do --OO and also discard docstrings; change the filename for compiled | |
| (bytecode) files by adding .opt-2 before the .pyc extension. | |
| --PP Don't automatically prepend a potentially unsafe path to ssyyss..ppaatthh | |
| such as the current directory, the script's directory or an empty | |
| string. See also the PPYYTTHHOONNSSAAFFEEPPAATTHH environment variable. | |
| --qq Do not print the version and copyright messages. These messages are | |
| also suppressed in non-interactive mode. | |
| --RR Turn on hash randomization. This option only has an effect if the | |
| PPYYTTHHOONNHHAASSHHSSEEEEDD environment variable is set to 00, since hash random‐ | |
| ization is enabled by default. | |
| --ss Don't add user site directory to sys.path. | |
| --SS Disable the import of the module _s_i_t_e and the site-dependent manipu‐ | |
| lations of _s_y_s_._p_a_t_h that it entails. Also disable these manipula‐ | |
| tions if _s_i_t_e is explicitly imported later. | |
| --uu Force the stdout and stderr streams to be unbuffered. This option | |
| has no effect on the stdin stream. | |
| --vv Print a message each time a module is initialized, showing the place | |
| (filename or built-in module) from which it is loaded. When given | |
| twice, print a message for each file that is checked for when | |
| searching for a module. Also provides information on module cleanup | |
| at exit. | |
| [---VV ,,-] | |
| {+--VV,+} ----vveerrssiioonn | |
| Prints the Python version number of the executable and exits. When | |
| given twice, print more information about the build. | |
| --WW _a_r_g_u_m_e_n_t | |
| Warning control. Python's warning machinery by default prints warn‐ | |
| ing messages to _s_y_s_._s_t_d_e_r_r. | |
| The simplest settings apply a particular action unconditionally to | |
| all warnings emitted by a process (even those that are otherwise ig‐ | |
| nored by default): | |
| [--Wdefault #-] | |
| {+--WWddeeffaauulltt+} | |
| Warn once per call location | |
| [--Werror #-] | |
| {+--WWeerrrroorr+} | |
| Convert to exceptions | |
| [--Walways #-] | |
| {+--WWaallwwaayyss+} | |
| Warn every time | |
| [--Wall #-] | |
| {+--WWaallll+} Same as -Walways | |
| [--Wmodule #-] | |
| {+--WWmmoodduullee+} | |
| Warn once per calling module | |
| [--Wonce #-] | |
| {+--WWoonnccee+} | |
| Warn once per Python process | |
| [--Wignore #-] | |
| {+--WWiiggnnoorree+} | |
| Never warn | |
| The action names can be abbreviated as desired and the interpreter | |
| will resolve them to the appropriate action name. For example, --WWii | |
| is the same as [---WWiiggnnoorree ..-] {+--WWiiggnnoorree.+} | |
| The full form of argument is: [-_a_c_t_i_o_n_:_m_e_s_s_a_g_e_:_c_a_t_e_g_o_r_y_:_m_o_d_u_l_e_:_l_i_n_e_n_o-] {+_a_c_t_i_o_n::_m_e_s_s_a_g_e::_c_a_t_e_g_o_r_y::_m_o_d_u_l_e::_l_i_n_e_n_o+} | |
| Empty fields match all values; trailing empty fields may be omitted. | |
| For example --WW iiggnnoorree::::DDeepprreeccaattiioonnWWaarrnniinngg ignores all Deprecation‐ | |
| Warning warnings. | |
| The _a_c_t_i_o_n field is as explained above but only applies to warnings | |
| that match the remaining fields. | |
| The _m_e_s_s_a_g_e field must match the whole printed warning message; this | |
| match is case-insensitive. | |
| The _c_a_t_e_g_o_r_y field matches the warning category (ex: "Deprecation‐ | |
| Warning"). This must be a class name; the match test whether the ac‐ | |
| tual warning category of the message is a subclass of the specified | |
| warning category. | |
| The _m_o_d_u_l_e field matches the (fully-qualified) module name; this | |
| match is case-sensitive. | |
| The _l_i_n_e_n_o field matches the line number, where zero matches all | |
| line numbers and is thus equivalent to an omitted line number. | |
| Multiple --WW options can be given; when a warning matches more than | |
| one option, the action for the last matching option is performed. | |
| Invalid --WW options are ignored (though, a warning message is printed | |
| about invalid options when the first warning is issued). | |
| Warnings can also be controlled using the PPYYTTHHOONNWWAARRNNIINNGGSS environment | |
| variable and from within a Python program using the warnings module. | |
| For example, the warnings.filterwarnings() function can be used to | |
| use a regular expression on the warning message. | |
| --XX _o_p_t_i_o_n | |
| Set implementation-specific option. The following options are avail‐ | |
| able: | |
| --XX ccppuu__ccoouunntt==_N | |
| Override the return value of _o_s_._c_p_u___c_o_u_n_t_(_). --XX | |
| ccppuu__ccoouunntt==ddeeffaauulltt cancels overriding. See also | |
| PPYYTTHHOONN__CCPPUU__CCOOUUNNTT. | |
| --XX ddeevv | |
| Enable CPython's "development mode", introducing additional | |
| runtime checks which are too expensive to be enabled by de‐ | |
| fault. It will not be more verbose than the default if the | |
| code is correct: new warnings are only emitted when an issue | |
| is detected. Effect of the developer mode: | |
| • Add default warning filter, as --WW ddeeffaauulltt. | |
| • Install debug hooks on memory allocators: see the PyMem_Se‐ | |
| tupDebugHooks() C function. | |
| • Enable the faulthandler module to dump the Python traceback | |
| on a crash. | |
| • Enable asyncio debug mode. | |
| • Set the dev_mode attribute of sys.flags to True. | |
| • io.IOBase destructor logs close() exceptions. | |
| --XX iimmppoorrttttiimmee | |
| Show how long each import takes. It shows module name, cumu‐ | |
| lative time (including nested imports) and self time (exclud‐ | |
| ing nested imports). Note that its output may be broken in | |
| multi-threaded application. Typical usage is ppyytthhoonn33 --XX iimm‐‐ | |
| ppoorrttttiimmee --cc ''iimmppoorrtt aassyynncciioo''. | |
| --XX iimmppoorrttttiimmee==22 enables additional output that indicates when | |
| an imported module has already been loaded. In such cases, | |
| the string ccaacchheedd will be printed in both time columns. | |
| --XX ffaauulltthhaannddlleerr | |
| Enable faulthandler. | |
| --XX ffrroozzeenn__mmoodduulleess==[oonn|ooffff] | |
| Whether or not frozen modules should be used. The default is | |
| "on" (or "off" if you are running a local build). | |
| --XX ggiill==[00|11] | |
| Enable (1) or disable (0) the GIL. See also PPYYTTHHOONN__GGIILL. Only | |
| available in builds configured with ----ddiissaabbllee--ggiill. | |
| --XX iinntt__mmaaxx__ssttrr__ddiiggiittss==_n_u_m_b_e_r | |
| Limit the size of int<->str conversions. This helps avoid | |
| denial of service attacks when parsing untrusted data. The | |
| default is sys.int_info.default_max_str_digits. 0 disables. | |
| --XX nnoo__ddeebbuugg__rraannggeess | |
| Disable the inclusion of the tables mapping extra location | |
| information (end line, start column offset and end column | |
| offset) to every instruction in code objects. This is useful | |
| when smaller code objects and pyc files are desired as well | |
| as suppressing the extra visual location indicators when the | |
| interpreter displays tracebacks. | |
| --XX ppeerrff | |
| Support the Linux "perf" profiler. See also PPYYTTHHOONNPPEERRFFSSUUPP‐‐ | |
| PPOORRTT==11. | |
| --XX ppeerrff__jjiitt | |
| Support the Linux "perf" profiler with DWARF support. See | |
| also PPYYTTHHOONN__PPEERRFF__JJIITT__SSUUPPPPOORRTT==11. | |
| --XX pprreessiittee==_M_O_D | |
| Import this module before site. See also PPYYTTHHOONN__PPRREESSIITTEE. | |
| This only works on debug builds. | |
| --XX ppyyccaacchhee__pprreeffiixx==_P_A_T_H | |
| Enable writing .pyc files to a parallel tree rooted at the | |
| given directory instead of to the code tree. | |
| --XX sshhoowwrreeffccoouunntt | |
| Output the total reference count and number of used memory | |
| blocks when the program finishes or after each statement in | |
| the interactive interpreter. This only works on debug builds. | |
| --XX ttrraacceemmaalllloocc | |
| Start tracing Python memory allocations using the tracemalloc | |
| module. By default, only the most recent frame is stored in a | |
| traceback of a trace. Use --XX ttrraacceemmaalllloocc==_N_F_R_A_M_E to start | |
| tracing with a traceback limit of NFRAME frames. | |
| --XX uuttff88 | |
| Enable UTF-8 mode for operating system interfaces, overriding | |
| the default locale-aware mode. --XX uuttff88==00 explicitly disables | |
| UTF-8 mode (even when it would otherwise activate automati‐ | |
| cally). See PPYYTTHHOONNUUTTFF88 for more details. | |
| --XX wwaarrnn__ddeeffaauulltt__eennccooddiinngg | |
| Enable opt-in EncodingWarning for 'encoding=None'. | |
| --xx Skip the first line of the source. This is intended for a DOS spe‐ | |
| cific hack only. Warning: the line numbers in error messages will | |
| be off by one! | |
| IINNTTEERRPPRREETTEERR IINNTTEERRFFAACCEE | |
| The interpreter interface resembles that of the UNIX shell: when called | |
| with standard input connected to a tty device, it prompts for commands and | |
| executes them until an EOF is read; when called with a file name argument | |
| or with a file as standard input, it reads and executes a _s_c_r_i_p_t from that | |
| file; when called with --cc _c_o_m_m_a_n_d, it executes the Python statement(s) | |
| given as _c_o_m_m_a_n_d. Here _c_o_m_m_a_n_d may contain multiple statements separated | |
| by newlines. Leading whitespace is significant in Python statements! In | |
| non-interactive mode, the entire input is parsed before it is executed. | |
| If available, the script name and additional arguments thereafter are | |
| passed to the script in the Python variable _s_y_s_._a_r_g_v, which is a list of | |
| strings (you must first _i_m_p_o_r_t _s_y_s to be able to access it). If no script | |
| name is given, _s_y_s_._a_r_g_v_[_0_] is an empty string; if --cc is used, _s_y_s_._a_r_g_v_[_0_] | |
| contains the string [-_'_-_c_'_.-] {+'_-_c'.+} Note that options interpreted by the Python in‐ | |
| terpreter itself are not placed in _s_y_s_._a_r_g_v. | |
| In interactive mode, the primary prompt is `>>>'; the second prompt (which | |
| appears when a command is not complete) is `...'. The prompts can be | |
| changed by assignment to _s_y_s_._p_s_1 or _s_y_s_._p_s_2. The interpreter quits when it | |
| reads an EOF at a prompt. When an unhandled exception occurs, a stack | |
| trace is printed and control returns to the primary prompt; in non-interac‐ | |
| tive mode, the interpreter exits after printing the stack trace. The in‐ | |
| terrupt signal raises the _K_e_y_b_o_a_r_d_I_n_t_e_r_r_u_p_t exception; other UNIX signals | |
| are not caught (except that SIGPIPE is sometimes ignored, in favor of the | |
| _I_O_E_r_r_o_r exception). Error messages are written to stderr. | |
| FFIILLEESS AANNDD DDIIRREECCTTOORRIIEESS | |
| These are subject to difference depending on local installation conven‐ | |
| tions; ${prefix} and ${exec_prefix} are installation-dependent and should | |
| be interpreted as for GNU software; they may be the same. The default for | |
| both is _/_u_s_r_/_l_o_c_a_l. | |
| _$_{_e_x_e_c___p_r_e_f_i_x_}_/_b_i_n_/_p_y_t_h_o_n | |
| Recommended location of the interpreter. | |
| _$_{_p_r_e_f_i_x_}_/_l_i_b_/_p_y_t_h_o_n_<_v_e_r_s_i_o_n_> | |
| _$_{_e_x_e_c___p_r_e_f_i_x_}_/_l_i_b_/_p_y_t_h_o_n_<_v_e_r_s_i_o_n_> | |
| Recommended locations of the directories containing the standard | |
| modules. | |
| _$_{_p_r_e_f_i_x_}_/_i_n_c_l_u_d_e_/_p_y_t_h_o_n_<_v_e_r_s_i_o_n_> | |
| _$_{_e_x_e_c___p_r_e_f_i_x_}_/_i_n_c_l_u_d_e_/_p_y_t_h_o_n_<_v_e_r_s_i_o_n_> | |
| Recommended locations of the directories containing the include | |
| files needed for developing Python extensions and embedding the in‐ | |
| terpreter. | |
| EENNVVIIRROONNMMEENNTT VVAARRIIAABBLLEESS | |
| PYTHONASYNCIODEBUG | |
| If this environment variable is set to a non-empty string, enable | |
| the debug mode of the asyncio module. | |
| PYTHON_BASIC_REPL | |
| If this variable is set to any value, the interpreter will not at‐ | |
| tempt to load the Python-based REPL that requires curses and read‐ | |
| line, and will instead use the traditional parser-based REPL. | |
| PYTHONBREAKPOINT | |
| If this environment variable is set to 0, it disables the default | |
| debugger. It can be set to the callable of your debugger of choice. | |
| PYTHONCOERCECLOCALE | |
| If set to the value 0, causes the main Python command line applica‐ | |
| tion to skip coercing the legacy ASCII-based C and POSIX locales to | |
| a more capable UTF-8 based alternative. | |
| PYTHON_COLORS | |
| If this variable is set to 1, the interpreter will colorize various | |
| kinds of output. Setting it to 0 deactivates this behavior. | |
| PYTHON_CPU_COUNT | |
| If this variable is set to a positive integer, it overrides the re‐ | |
| turn values of _o_s_._c_p_u___c_o_u_n_t and _o_s_._p_r_o_c_e_s_s___c_p_u___c_o_u_n_t. | |
| See also the --XX ccppuu__ccoouunntt option. | |
| PYTHONDEBUG | |
| If this is set to a non-empty string it is equivalent to specifying | |
| the --dd option. If set to an integer, it is equivalent to specifying | |
| --dd multiple times. | |
| PYTHONEXECUTABLE | |
| If this environment variable is set, _s_y_s_._a_r_g_v_[_0_] will be set to its | |
| value instead of the value got through the C runtime. Only works on | |
| Mac OS X. | |
| PYTHONFAULTHANDLER | |
| If this environment variable is set to a non-empty string, _f_a_u_l_t_‐ | |
| _h_a_n_d_l_e_r_._e_n_a_b_l_e_(_) is called at startup: install a handler for | |
| SIGSEGV, SIGFPE, SIGABRT, SIGBUS and SIGILL signals to dump the | |
| Python traceback. | |
| This is equivalent to the --XX ffaauulltthhaannddlleerr option. | |
| PYTHON_FROZEN_MODULES | |
| If this variable is set to oonn or ooffff, it determines whether or not | |
| frozen modules are ignored by the import machinery. A value of oonn | |
| means they get imported and ooffff means they are ignored. The default | |
| is oonn for non-debug builds (the normal case) and ooffff for debug | |
| builds. | |
| See also the --XX ffrroozzeenn__mmoodduulleess option. | |
| PYTHON_GIL | |
| If this variable is set to 1, the global interpreter lock (GIL) will | |
| be forced on. Setting it to 0 forces the GIL off. Only available in | |
| builds configured with ----ddiissaabbllee--ggiill. | |
| This is equivalent to the --XX ggiill option. | |
| PYTHON_HISTORY | |
| This environment variable can be used to set the location of a his‐ | |
| tory file (on Unix, it is _~_/_._p_y_t_h_o_n___h_i_s_t_o_r_y by default). | |
| PYTHONNODEBUGRANGES | |
| If this variable is set, it disables the inclusion of the tables | |
| mapping extra location information (end line, start column offset | |
| and end column offset) to every instruction in code objects. This is | |
| useful when smaller code objects and pyc files are desired as well | |
| as suppressing the extra visual location indicators when the inter‐ | |
| preter displays tracebacks. | |
| PYTHONDONTWRITEBYTECODE | |
| If this is set to a non-empty string it is equivalent to specifying | |
| the --BB option (don't try to write _._p_y_c files). | |
| PYTHONDEVMODE | |
| If this environment variable is set to a non-empty string, enable | |
| Python's "development mode", introducing additional runtime checks | |
| that are too expensive to be enabled by default. | |
| This is equivalent to the --XX ddeevv option. | |
| PYTHONHASHSEED | |
| If this variable is set to "random", a random value is used to seed | |
| the hashes of str and bytes objects. | |
| If PYTHONHASHSEED is set to an integer value, it is used as a fixed | |
| seed for generating the hash() of the types covered by the hash ran‐ | |
| domization. Its purpose is to allow repeatable hashing, such as for | |
| selftests for the interpreter itself, or to allow a cluster of | |
| python processes to share hash values. | |
| The integer must be a decimal number in the range [0,4294967295]. | |
| Specifying the value 0 will disable hash randomization. | |
| PYTHONHOME | |
| Change the location of the standard Python libraries. By default, | |
| the libraries are searched in ${prefix}/lib/python<version> and | |
| ${exec_prefix}/lib/python<version>, where ${prefix} and ${exec_pre‐ | |
| fix} are installation-dependent directories, both defaulting to | |
| _/_u_s_r_/_l_o_c_a_l. When $PYTHONHOME is set to a single directory, its | |
| value replaces both ${prefix} and ${exec_prefix}. To specify dif‐ | |
| ferent values for these, set $PYTHONHOME to ${prefix}:${exec_pre‐ | |
| fix}. | |
| PYTHONINSPECT | |
| If this is set to a non-empty string it is equivalent to specifying | |
| the --ii option. | |
| PYTHONINTMAXSTRDIGITS | |
| Limit the maximum digit characters in an int value when converting | |
| from a string and when converting an int back to a str. A value of | |
| 0 disables the limit. Conversions to or from bases 2, 4, 8, 16, and | |
| 32 are never limited. | |
| This is equivalent to the --XX iinntt__mmaaxx__ssttrr__ddiiggiittss==_N_U_M_B_E_R option. | |
| PYTHONIOENCODING | |
| If this is set before running the interpreter, it overrides the en‐ | |
| coding used for stdin/stdout/stderr, in the syntax _e_n_c_o_d_i_n_g_n_a_m_e::_e_r_‐ | |
| _r_o_r_h_a_n_d_l_e_r The _e_r_r_o_r_h_a_n_d_l_e_r part is optional and has the same mean‐ | |
| ing as in str.encode. For stderr, the _e_r_r_o_r_h_a_n_d_l_e_r part is ignored; | |
| the handler will always be ´backslashreplace´. | |
| PYTHONMALLOC | |
| Set the Python memory allocators and/or install debug hooks. The | |
| available memory allocators are _m_a_l_l_o_c and _p_y_m_a_l_l_o_c. The available | |
| debug hooks are _d_e_b_u_g, _m_a_l_l_o_c___d_e_b_u_g, and _p_y_m_a_l_l_o_c___d_e_b_u_g. | |
| When Python is compiled in debug mode, the default is _p_y_m_a_l_l_o_c___d_e_b_u_g | |
| and the debug hooks are automatically used. Otherwise, the default | |
| is _p_y_m_a_l_l_o_c. | |
| PYTHONMALLOCSTATS | |
| If set to a non-empty string, Python will print statistics of the | |
| pymalloc memory allocator every time a new pymalloc object arena is | |
| created, and on shutdown. | |
| This variable is ignored if the $PPYYTTHHOONNMMAALLLLOOCC environment variable | |
| is used to force the mmaalllloocc(3) allocator of the C library, or if | |
| Python is configured without pymalloc support. | |
| PYTHONNOUSERSITE | |
| If this is set to a non-empty string it is equivalent to specifying | |
| the --ss option (Don't add the user site directory to sys.path). | |
| PYTHONOPTIMIZE | |
| If this is set to a non-empty string it is equivalent to specifying | |
| the --OO option. If set to an integer, it is equivalent to specifying | |
| --OO multiple times. | |
| PYTHONPATH | |
| Augments the default search path for module files. The format is | |
| the same as the shell's $PATH: one or more directory pathnames sepa‐ | |
| rated by colons. Non-existent directories are silently ignored. | |
| The default search path is installation dependent, but generally be‐ | |
| gins with ${prefix}/lib/python<version> (see PYTHONHOME above). The | |
| default search path is always appended to $PYTHONPATH. If a script | |
| argument is given, the directory containing the script is inserted | |
| in the path in front of $PYTHONPATH. The search path can be manipu‐ | |
| lated from within a Python program as the variable _s_y_s_._p_a_t_h. | |
| PYTHON_PERF_JIT_SUPPORT | |
| If this variable is set to a nonzero value, it enables support for | |
| the Linux perf profiler so Python calls can be detected by it using | |
| DWARF information. Setting to 0 disables. | |
| See also the --XX ppeerrff__jjiitt option. | |
| PYTHONPERFSUPPORT | |
| If this variable is set to a nonzero value, it enables support for | |
| the Linux perf profiler so Python calls can be detected by it. Set‐ | |
| ting to 0 disables. | |
| See also the --XX ppeerrff option. | |
| PYTHONPLATLIBDIR | |
| Override sys.platlibdir. | |
| PYTHONPROFILEIMPORTTIME | |
| If this environment variable is set to 11, Python will show how long | |
| each import takes. If set to 22, Python will include output for im‐ | |
| ported modules that have already been loaded. This is exactly | |
| equivalent to setting --XX iimmppoorrttttiimmee on the command line. | |
| PYTHONPYCACHEPREFIX | |
| If this is set, Python will write ..ppyycc files in a mirror directory | |
| tree at this path, instead of in ____ppyyccaacchhee____ directories within the | |
| source tree. | |
| This is equivalent to specifying the --XX ppyyccaacchhee__pprreeffiixx==_P_A_T_H option. | |
| PYTHONSAFEPATH | |
| If this is set to a non-empty string, don't automatically prepend a | |
| potentially unsafe path to ssyyss..ppaatthh such as the current directory, | |
| the script's directory or an empty string. See also the --PP option. | |
| PYTHONSTARTUP | |
| If this is the name of a readable file, the Python commands in that | |
| file are executed before the first prompt is displayed in interac‐ | |
| tive mode. The file is executed in the same name space where inter‐ | |
| active commands are executed so that objects defined or imported in | |
| it can be used without qualification in the interactive session. | |
| You can also change the prompts _s_y_s_._p_s_1 and _s_y_s_._p_s_2 in this file. | |
| PYTHONTRACEMALLOC | |
| If this environment variable is set to a non-empty string, start | |
| tracing Python memory allocations using the tracemalloc module. | |
| The value of the variable is the maximum number of frames stored in | |
| a traceback of a trace. For example, _P_Y_T_H_O_N_T_R_A_C_E_M_A_L_L_O_C_=_1 stores only | |
| the most recent frame. | |
| PYTHONUNBUFFERED | |
| If this is set to a non-empty string it is equivalent to specifying | |
| the --uu option. | |
| PYTHONUSERBASE | |
| Defines the user base directory, which is used to compute the path | |
| of the user _s_i_t_e_-_p_a_c_k_a_g_e_s directory and installation paths for | |
| _p_y_t_h_o_n _-_m _p_i_p _i_n_s_t_a_l_l _-_-_u_s_e_r. | |
| PYTHONUTF8 | |
| If set to 1, enable the Python "UTF-8 Mode". Setting to 0 disables. | |
| PYTHONVERBOSE | |
| If this is set to a non-empty string it is equivalent to specifying | |
| the --vv option. If set to an integer, it is equivalent to specifying | |
| --vv multiple times. | |
| PYTHONWARNDEFAULTENCODING | |
| If this environment variable is set to a non-empty string, issue a | |
| _E_n_c_o_d_i_n_g_W_a_r_n_i_n_g when the locale-specific default encoding is used. | |
| PYTHONWARNINGS | |
| If this is set to a comma-separated string it is equivalent to spec‐ | |
| ifying the --WW option for each separate value. | |
| DDeebbuugg--mmooddee vvaarriiaabblleess | |
| Setting these variables only has an effect in a debug build of Python, that | |
| is, if Python was configured with the ----wwiitthh--ppyyddeebbuugg build option. | |
| PYTHONDUMPREFS | |
| If this environment variable is set, Python will dump objects and | |
| reference counts still alive after shutting down the interpreter. | |
| PYTHONDUMPREFSFILE | |
| If set, Python will dump objects and reference counts still alive | |
| after shutting down the interpreter into a file under the path given | |
| as the value to this environment variable. | |
| PYTHON_PRESITE | |
| If this variable is set to a module, that module will be imported | |
| early in the interpreter lifecycle, before the _s_i_t_e module is exe‐ | |
| cuted, and before the _____m_a_i_n____ module is created. This only works | |
| on debug builds. | |
| This is equivalent to the --XX pprreessiittee==_m_o_d_u_l_e option. | |
| AAUUTTHHOORR | |
| The Python Software Foundation: https://www.python.org/psf/ | |
| IINNTTEERRNNEETT RREESSOOUURRCCEESS | |
| Main website: https://www.python.org/ | |
| Documentation: https://docs.python.org/ | |
| Developer resources: https://devguide.python.org/ | |
| Downloads: https://www.python.org/downloads/ | |
| Module repository: https://pypi.org/ | |
| Newsgroups: comp.lang.python, comp.lang.python.announce | |
| LLIICCEENNSSIINNGG | |
| Python is distributed under an Open Source license. See the file "LICENSE" | |
| in the Python source distribution for information on terms & conditions for | |
| accessing and otherwise using Python and for a DISCLAIMER OF ALL WAR‐ | |
| RANTIES. | |
| _P_Y_T_H_O_N(1) |
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