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GeezerVison is showing github.com — cpython/Misc/python.man at main · python/cpython Expand file tree/ Copy pathpython.manMore file actions 782 lines (766 loc) · 24.4 KB / Copy pathpython.manFile metadata and controls782 lines (766 loc) · 24.4 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 .TH PYTHON 1 .\" To view this file while editing, run it through groff: .\" groff -Tascii -man python.man | less .SH NAME python \- an interpreted, interactive, object-oriented programming language .SH SYNOPSIS .B python [ .B \-B ] [ .B \-b ] [ .B \-d ] [ .B \-E ] [ .B \-h ] [ .B \-i ] [ .B \-I ] .br [ .B \-m .I module-name ] [ .B \-q ] [ .B \-R ] [ .B \-O ] [ .B \-OO ] [ .B \-P ] [ .B \-s ] [ .B \-S ] [ .B \-u ] .br [ .B \-v ] [ .B \-V ] [ .B \-W .I argument ] [ .B \-x ] [ .B \-X .I option ] [ .B \-? ] .br [ .B \-\-check-hash-based-pycs .I default | .I always | .I never ] .br [ .B \-\-help ] [ .B \-\-help\-env ] [ .B \-\-help\-xoptions ] [ .B \-\-help\-all ] .br [ .B \-c .I command | .I script | \- ] [ .I arguments ] .SH DESCRIPTION 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 Reference documents built-in and standard types, constants, functions and modules. Finally, the Python Reference Manual describes the syntax and semantics of the core language in (perhaps too) much detail. (These documents may be located via the .B "INTERNET RESOURCES" below; they may be installed on your system as well.) .PP 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. .PP Documentation for installed Python modules and packages can be viewed by running the .B pydoc program. .SH COMMAND LINE OPTIONS .TP .B \-B Don't write .I .pyc files on import. See also PYTHONDONTWRITEBYTECODE. .TP .B \-b Issue warnings about str(bytes_instance), str(bytearray_instance) and comparing bytes/bytearray with str. (\-bb: issue errors) .TP .BI "\-c " command Specify the command to execute (see next section). This terminates the option list (following options are passed as arguments to the command). .TP .BI "\-\-check\-hash\-based\-pycs " mode Configure how Python evaluates the up-to-dateness of hash-based .pyc files. .TP .B \-d Turn on parser debugging output (for expert only, depending on compilation options). .TP .B \-E Ignore environment variables like PYTHONPATH and PYTHONHOME that modify the behavior of the interpreter. .TP .BR \-h ", " \-? ", " \-\-help Prints the usage for the interpreter executable and exits. .TP .B "\-\-help\-env" Prints help about Python-specific environment variables and exits. .TP .B "\-\-help\-xoptions" Prints help about implementation-specific \fB\-X\fP options and exits. .TP .B "\-\-help\-all" Prints complete usage information and exits. .TP .B \-i When a script is passed as first argument or the \fB\-c\fP 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 inspect global variables or a stack trace when a script raises an exception. .TP .B \-I Run Python in isolated mode. This also implies \fB\-E\fP, \fB\-P\fP and \fB\-s\fP. In isolated mode sys.path contains neither the script's directory nor the user's site\-packages directory. All PYTHON* environment variables are ignored, too. Further restrictions may be imposed to prevent the user from injecting malicious code. .TP .BI "\-m " module-name Searches .I sys.path for the named module and runs the corresponding .I .py file as a script. This terminates the option list (following options are passed as arguments to the module). .TP .B \-O 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. .TP .B \-OO Do \fB\-O\fP and also discard docstrings; change the filename for compiled (bytecode) files by adding .opt-2 before the .pyc extension. .TP .B \-P Don't automatically prepend a potentially unsafe path to \fBsys.path\fP such as the current directory, the script's directory or an empty string. See also the \fBPYTHONSAFEPATH\fP environment variable. .TP .B \-q Do not print the version and copyright messages. These messages are also suppressed in non-interactive mode. .TP .B \-R Turn on hash randomization. This option only has an effect if the \fBPYTHONHASHSEED\fR environment variable is set to \fB0\fR, since hash randomization is enabled by default. .TP .B \-s Don't add user site directory to sys.path. .TP .B \-S Disable the import of the module .I site and the site-dependent manipulations of .I sys.path that it entails. Also disable these manipulations if .I site is explicitly imported later. .TP .B \-u Force the stdout and stderr streams to be unbuffered. This option has no effect on the stdin stream. .TP .B \-v 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. .TP .BR \-V ", " \-\-version Prints the Python version number of the executable and exits. When given twice, print more information about the build. .TP .BI "\-W " argument Warning control. Python's warning machinery by default prints warning messages to .IR sys.stderr . The simplest settings apply a particular action unconditionally to all warnings emitted by a process (even those that are otherwise ignored by default): .RS .TP .B \-Wdefault Warn once per call location .TP .B \-Werror Convert to exceptions .TP .B \-Walways Warn every time .TP .B \-Wall Same as \-Walways .TP .B \-Wmodule Warn once per calling module .TP .B \-Wonce Warn once per Python process .TP .B \-Wignore Never warn .RE .IP The action names can be abbreviated as desired and the interpreter will resolve them to the appropriate action name. For example, .B \-Wi is the same as .BR \-Wignore . The full form of argument is: .IB action : message : category : module : lineno Empty fields match all values; trailing empty fields may be omitted. For example .B \-W ignore::DeprecationWarning ignores all DeprecationWarning warnings. The .I action field is as explained above but only applies to warnings that match the remaining fields. The .I message field must match the start of the warning message; this match is case-insensitive. The .I category field matches the warning category (ex: "DeprecationWarning"). This must be a class name; the match test whether the actual warning category of the message is a subclass of the specified warning category. The .I module field matches the (fully-qualified) module name; this match is case-sensitive. The .I lineno field matches the line number, where zero matches all line numbers and is thus equivalent to an omitted line number. Multiple .B \-W options can be given; when a warning matches more than one option, the action for the last matching option is performed. Invalid .B \-W 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 .B PYTHONWARNINGS 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. .TP .BI "\-X " option Set implementation-specific option. The following options are available: .RS .TP \fB\-X cpu_count=\fIN\fR Override the return value of \fIos.cpu_count()\fR. \fB\-X cpu_count=default\fR cancels overriding. See also \fBPYTHON_CPU_COUNT\fR. .TP \fB\-X dev\fR Enable CPython's "development mode", introducing additional runtime checks which are too expensive to be enabled by default. 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: .RS .IP \(bu 2 Add default warning filter, as \fB\-W default\fR. .IP \(bu 2 Install debug hooks on memory allocators: see the PyMem_SetupDebugHooks() C function. .IP \(bu 2 Enable the faulthandler module to dump the Python traceback on a crash. .IP \(bu 2 Enable asyncio debug mode. .IP \(bu 2 Set the dev_mode attribute of sys.flags to True. .IP \(bu 2 io.IOBase destructor logs close() exceptions. .RE .TP \fB\-X importtime\fR Show how long each import takes. It shows module name, cumulative time (including nested imports) and self time (excluding nested imports). Note that its output may be broken in multi-threaded application. Typical usage is \fBpython3 \-X importtime \-c 'import asyncio'\fR. .IP \fB\-X importtime=2\fR enables additional output that indicates when an imported module has already been loaded. In such cases, the string \fBcached\fR will be printed in both time columns. .TP \fB\-X faulthandler\fR Enable faulthandler. .TP \fB\-X frozen_modules=\fR[\fBon\fR|\fBoff\fR] Whether or not frozen modules should be used. The default is "on" (or "off" if you are running a local build). .TP \fB\-X gil=\fR[\fB0\fR|\fB1\fR] Enable (1) or disable (0) the GIL. See also \fBPYTHON_GIL\fR. Only available in builds configured with \fB\-\-disable\-gil\fR. .TP \fB\-X int_max_str_digits=\fInumber\fR 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. .TP \fB\-X no_debug_ranges\fR 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. .TP \fB\-X perf\fR Support the Linux "perf" profiler. See also \fBPYTHONPERFSUPPORT=1\fR. .TP \fB\-X perf_jit\fR Support the Linux "perf" profiler with DWARF support. See also \fBPYTHON_PERF_JIT_SUPPORT=1\fR. .TP \fB\-X presite=\fIMOD\fR Import this module before site. See also \fBPYTHON_PRESITE\fR. This only works on debug builds. .TP \fB\-X pycache_prefix=\fIPATH\fR Enable writing .pyc files to a parallel tree rooted at the given directory instead of to the code tree. .TP \fB\-X showrefcount\fR 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. .TP \fB\-X tracemalloc\fR 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 \fB\-X tracemalloc=\fINFRAME\fR to start tracing with a traceback limit of NFRAME frames. .TP \fB\-X utf8\fR Enable UTF-8 mode for operating system interfaces, overriding the default locale-aware mode. \fB\-X utf8=0\fR explicitly disables UTF-8 mode (even when it would otherwise activate automatically). See \fBPYTHONUTF8\fR for more details. .TP \fB\-X warn_default_encoding\fR Enable opt-in EncodingWarning for 'encoding=None'. .RE .TP .B \-x Skip the first line of the source. This is intended for a DOS specific hack only. Warning: the line numbers in error messages will be off by one! .SH INTERPRETER INTERFACE 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 .I script from that file; when called with .B \-c .IR command , it executes the Python statement(s) given as .IR command . Here .I command 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. .PP If available, the script name and additional arguments thereafter are passed to the script in the Python variable .IR sys.argv , which is a list of strings (you must first .I import sys to be able to access it). If no script name is given, .I sys.argv[0] is an empty string; if .B \-c is used, .I sys.argv[0] contains the string .RI ' \-c '. Note that options interpreted by the Python interpreter itself are not placed in .IR sys.argv . .PP 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 .I sys.ps1 or .IR sys.ps2 . 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-interactive mode, the interpreter exits after printing the stack trace. The interrupt signal raises the .I Keyboard\%Interrupt exception; other UNIX signals are not caught (except that SIGPIPE is sometimes ignored, in favor of the .I IOError exception). Error messages are written to stderr. .SH FILES AND DIRECTORIES These are subject to difference depending on local installation conventions; ${prefix} and ${exec_prefix} are installation-dependent and should be interpreted as for GNU software; they may be the same. The default for both is \fI/usr/local\fP. .IP \fI${exec_prefix}/bin/python\fP Recommended location of the interpreter. .PP .I ${prefix}/lib/python<version> .br .I ${exec_prefix}/lib/python<version> .RS Recommended locations of the directories containing the standard modules. .RE .PP .I ${prefix}/include/python<version> .br .I ${exec_prefix}/include/python<version> .RS Recommended locations of the directories containing the include files needed for developing Python extensions and embedding the interpreter. .RE .SH ENVIRONMENT VARIABLES .IP PYTHONASYNCIODEBUG If this environment variable is set to a non-empty string, enable the debug mode of the asyncio module. .IP PYTHON_BASIC_REPL If this variable is set to any value, the interpreter will not attempt to load the Python-based REPL that requires curses and readline, and will instead use the traditional parser-based REPL. .IP 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. .IP PYTHONCOERCECLOCALE If set to the value 0, causes the main Python command line application to skip coercing the legacy ASCII-based C and POSIX locales to a more capable UTF-8 based alternative. .IP PYTHON_COLORS If this variable is set to 1, the interpreter will colorize various kinds of output. Setting it to 0 deactivates this behavior. .IP PYTHON_CPU_COUNT If this variable is set to a positive integer, it overrides the return values of \fIos.cpu_count\fR and \fIos.process_cpu_count\fR. .IP See also the \fB\-X cpu_count\fR option. .IP PYTHONDEBUG If this is set to a non-empty string it is equivalent to specifying the \fB\-d\fP option. If set to an integer, it is equivalent to specifying \fB\-d\fP multiple times. .IP PYTHONEXECUTABLE If this environment variable is set, .I sys.argv[0] will be set to its value instead of the value got through the C runtime. Only works on Mac OS X. .IP PYTHONFAULTHANDLER If this environment variable is set to a non-empty string, .I faulthandler.enable() is called at startup: install a handler for SIGSEGV, SIGFPE, SIGABRT, SIGBUS and SIGILL signals to dump the Python traceback. .IP This is equivalent to the \fB\-X faulthandler\fP option. .IP PYTHON_FROZEN_MODULES If this variable is set to \fBon\fR or \fBoff\fR, it determines whether or not frozen modules are ignored by the import machinery. A value of \fBon\fR means they get imported and \fBoff\fR means they are ignored. The default is \fBon\fR for non-debug builds (the normal case) and \fBoff\fR for debug builds. .IP See also the \fB\-X frozen_modules\fR option. .IP 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 \fB\-\-disable\-gil\fP. .IP This is equivalent to the \fB\-X gil\fR option. .IP PYTHON_HISTORY This environment variable can be used to set the location of a history file (on Unix, it is \fI~/.python_history\fP by default). .IP 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 interpreter displays tracebacks. .IP PYTHONDONTWRITEBYTECODE If this is set to a non-empty string it is equivalent to specifying the \fB\-B\fP option (don't try to write .I .pyc files). .IP 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. .IP This is equivalent to the \fB\-X dev\fR option. .IP 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 randomization. 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 [0,4\|294\|967\|295]. Specifying the value 0 will disable hash randomization. .IP 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_prefix} are installation-dependent directories, both defaulting to \fI/usr/local\fP. When $PYTHONHOME is set to a single directory, its value replaces both ${prefix} and ${exec_prefix}. To specify different values for these, set $PYTHONHOME to ${prefix}:${exec_prefix}. .IP PYTHONINSPECT If this is set to a non-empty string it is equivalent to specifying the \fB\-i\fP option. .IP 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. .IP This is equivalent to the \fB\-X int_max_str_digits=\fINUMBER\fR option. .IP PYTHONIOENCODING If this is set before running the interpreter, it overrides the encoding used for stdin/stdout/stderr, in the syntax .IB encodingname : errorhandler The .I errorhandler part is optional and has the same meaning as in str.encode. For stderr, the .I errorhandler part is ignored; the handler will always be \'backslashreplace\'. .IP PYTHONMALLOC Set the Python memory allocators and/or install debug hooks. The available memory allocators are .I malloc and .IR pymalloc . The available debug hooks are .IR debug , .IR malloc_debug , and .IR pymalloc_debug . .IP When Python is compiled in debug mode, the default is .I pymalloc_debug and the debug hooks are automatically used. Otherwise, the default is .IR pymalloc . .IP 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. .IP This variable is ignored if the .RB $ PYTHONMALLOC environment variable is used to force the .BR malloc (3) allocator of the C library, or if Python is configured without pymalloc support. .IP PYTHONNOUSERSITE If this is set to a non-empty string it is equivalent to specifying the \fB\-s\fP option (Don't add the user site directory to sys.path). .IP PYTHONOPTIMIZE If this is set to a non-empty string it is equivalent to specifying the \fB\-O\fP option. If set to an integer, it is equivalent to specifying \fB\-O\fP multiple times. .IP PYTHONPATH Augments the default search path for module files. The format is the same as the shell's $PATH: one or more directory pathnames separated by colons. Non-existent directories are silently ignored. The default search path is installation dependent, but generally begins 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 manipulated from within a Python program as the variable .IR sys.path . .IP 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. .IP See also the \fB\-X perf_jit\fR option. .IP 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. Setting to 0 disables. .IP See also the \fB\-X perf\fR option. .IP PYTHONPLATLIBDIR Override sys.platlibdir. .IP PYTHONPROFILEIMPORTTIME If this environment variable is set to \fB1\fR, Python will show how long each import takes. If set to \fB2\fR, Python will include output for imported modules that have already been loaded. This is exactly equivalent to setting \fB\-X importtime\fP on the command line. .IP PYTHONPYCACHEPREFIX If this is set, Python will write \fB.pyc\fR files in a mirror directory tree at this path, instead of in \fB__pycache__\fR directories within the source tree. .IP This is equivalent to specifying the \fB\-X pycache_prefix=\fIPATH\fR option. .IP PYTHONSAFEPATH If this is set to a non-empty string, don't automatically prepend a potentially unsafe path to \fBsys.path\fP such as the current directory, the script's directory or an empty string. See also the \fB\-P\fP option. .IP 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 interactive mode. The file is executed in the same name space where interactive 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 .I sys.ps1 and .I sys.ps2 in this file. .IP PYTHONTRACEMALLOC If this environment variable is set to a non-empty string, start tracing Python memory allocations using the tracemalloc module. .IP The value of the variable is the maximum number of frames stored in a traceback of a trace. For example, .I PYTHONTRACEMALLOC=1 stores only the most recent frame. .IP PYTHONUNBUFFERED If this is set to a non-empty string it is equivalent to specifying the \fB\-u\fP option. .IP PYTHONUSERBASE Defines the user base directory, which is used to compute the path of the user .I site\-packages directory and installation paths for .IR "python \-m pip install \-\-user" . .IP PYTHONUTF8 If set to 1, enable the Python "UTF-8 Mode". Setting to 0 disables. .IP PYTHONVERBOSE If this is set to a non-empty string it is equivalent to specifying the \fB\-v\fP option. If set to an integer, it is equivalent to specifying \fB\-v\fP multiple times. .IP PYTHONWARNDEFAULTENCODING If this environment variable is set to a non-empty string, issue a \fIEncodingWarning\fR when the locale-specific default encoding is used. .IP PYTHONWARNINGS If this is set to a comma-separated string it is equivalent to specifying the \fB\-W\fP option for each separate value. .SS Debug-mode variables Setting these variables only has an effect in a debug build of Python, that is, if Python was configured with the \fB\-\-with\-pydebug\fP build option. .IP PYTHONDUMPREFS If this environment variable is set, Python will dump objects and reference counts still alive after shutting down the interpreter. .IP 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. .IP PYTHON_PRESITE If this variable is set to a module, that module will be imported early in the interpreter lifecycle, before the \fIsite\fR module is executed, and before the \fI__main__\fR module is created. This only works on debug builds. .IP This is equivalent to the \fB\-X presite=\fImodule\fR option. .SH AUTHOR The Python Software Foundation: https://www.python.org/psf/ .SH INTERNET RESOURCES Main website: https://www.python.org/ .br Documentation: https://docs.python.org/ .br Developer resources: https://devguide.python.org/ .br Downloads: https://www.python.org/downloads/ .br Module repository: https://pypi.org/ .br Newsgroups: comp.lang.python, comp.lang.python.announce .SH LICENSING 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 WARRANTIES. |
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