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gh-90300: Reformat the Python CLI help output (GH-93415)
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@serhiy-storchaka
serhiy-storchaka committed Feb 23, 2024
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Showing 1 changed file with 106 additions and 108 deletions.
214 changes: 106 additions & 108 deletions Python/initconfig.c
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Expand Up @@ -153,7 +153,8 @@ Options (and corresponding environment variables):\n\
.pyc extension; also PYTHONOPTIMIZE=x\n\
-OO : do -O changes and also discard docstrings; add .opt-2 before\n\
.pyc extension\n\
-P : don't prepend a potentially unsafe path to sys.path; also PYTHONSAFEPATH\n\
-P : don't prepend a potentially unsafe path to sys.path; also\n\
PYTHONSAFEPATH\n\
-q : don't print version and copyright messages on interactive startup\n\
-s : don't add user site directory to sys.path; also PYTHONNOUSERSITE\n\
-S : don't imply 'import site' on initialization\n\
Expand All @@ -169,9 +170,10 @@ Options (and corresponding environment variables):\n\
-X opt : set implementation-specific option\n\
--check-hash-based-pycs always|default|never:\n\
control how Python invalidates hash-based .pyc files\n\
--help-env : print help about Python environment variables and exit\n\
--help-xoptions : print help about implementation-specific -X options and exit\n\
--help-all : print complete help information and exit\n\
--help-env: print help about Python environment variables and exit\n\
--help-xoptions: print help about implementation-specific -X options and exit\n\
--help-all: print complete help information and exit\n\
\n\
Arguments:\n\
file : program read from script file\n\
- : program read from stdin (default; interactive mode if a tty)\n\
Expand All @@ -180,139 +182,135 @@ arg ...: arguments passed to program in sys.argv[1:]\n\

static const char usage_xoptions[] = "\
The following implementation-specific options are available:\n\
\n\
-X faulthandler: enable faulthandler\n\
\n\
-X showrefcount: output the total reference count and number of used\n\
memory blocks when the program finishes or after each statement in the\n\
interactive interpreter. This only works on debug builds\n\
\n\
memory blocks when the program finishes or after each statement in\n\
the interactive interpreter. This only works on debug builds\n\
-X tracemalloc: start tracing Python memory allocations using the\n\
tracemalloc module. By default, only the most recent frame is stored in a\n\
traceback of a trace. Use -X tracemalloc=NFRAME to start tracing with a\n\
traceback limit of NFRAME frames\n\
\n\
-X importtime: show how long each import takes. It shows module name,\n\
cumulative time (including nested imports) and self time (excluding\n\
nested imports). Note that its output may be broken in multi-threaded\n\
application. Typical usage is python3 -X importtime -c 'import asyncio'\n\
\n\
-X dev: enable CPython's \"development mode\", introducing additional runtime\n\
checks which are too expensive to be enabled by default. Effect of the\n\
developer mode:\n\
* Add default warning filter, as -W default\n\
* Install debug hooks on memory allocators: see the PyMem_SetupDebugHooks()\n\
C function\n\
* Enable the faulthandler module to dump the Python traceback on a crash\n\
* Enable asyncio debug mode\n\
* Set the dev_mode attribute of sys.flags to True\n\
* io.IOBase destructor logs close() exceptions\n\
\n\
-X utf8: enable UTF-8 mode for operating system interfaces, overriding the default\n\
locale-aware mode. -X utf8=0 explicitly disables UTF-8 mode (even when it would\n\
otherwise activate automatically)\n\
\n\
-X pycache_prefix=PATH: enable writing .pyc files to a parallel tree rooted at the\n\
given directory instead of to the code tree\n\
\n\
tracemalloc module. By default, only the most recent frame is stored\n\
in a traceback of a trace. Use -X tracemalloc=NFRAME to start\n\
tracing with a traceback limit of NFRAME frames\n\
-X importtime: show how long each import takes. It shows module name,\n\
cumulative time (including nested imports) and self time (excluding\n\
nested imports). Note that its output may be broken in\n\
multi-threaded application.\n\
Typical usage is python3 -X importtime -c 'import asyncio'\n\
-X dev : enable CPython's \"development mode\", introducing additional runtime\n\
checks which are too expensive to be enabled by default. Effect of\n\
the developer mode:\n\
* Add default warning filter, as -W default\n\
* Install debug hooks on memory allocators: see the\n\
PyMem_SetupDebugHooks() C function\n\
* Enable the faulthandler module to dump the Python traceback on\n\
a crash\n\
* Enable asyncio debug mode\n\
* Set the dev_mode attribute of sys.flags to True\n\
* io.IOBase destructor logs close() exceptions\n\
-X utf8: enable UTF-8 mode for operating system interfaces, overriding the\n\
default locale-aware mode. -X utf8=0 explicitly disables UTF-8 mode\n\
(even when it would otherwise activate automatically)\n\
-X pycache_prefix=PATH: enable writing .pyc files to a parallel tree rooted\n\
at the given directory instead of to the code tree\n\
-X warn_default_encoding: enable opt-in EncodingWarning for 'encoding=None'\n\
\n\
-X no_debug_ranges: disable the inclusion of the tables mapping extra location \n\
information (end line, start column offset and end column offset) to every \n\
instruction in code objects. This is useful when smaller code objects and pyc \n\
files are desired as well as suppressing the extra visual location indicators \n\
when the interpreter displays tracebacks.\n\
\n\
-X perf: activate support for the Linux \"perf\" profiler by activating the \"perf\"\n\
trampoline. When this option is activated, the Linux \"perf\" profiler will be \n\
able to report Python calls. This option is only available on some platforms and will \n\
do nothing if is not supported on the current system. The default value is \"off\".\n\
\n\
-X no_debug_ranges: disable the inclusion of the tables mapping extra location\n\
information (end line, start column offset and end column offset) to\n\
every instruction in code objects. This is useful when smaller code\n\
objects and pyc files are desired as well as suppressing the extra\n\
visual location indicators when the interpreter displays tracebacks.\n\
-X perf: activate support for the Linux \"perf\" profiler by activating the\n\
\"perf\" trampoline. When this option is activated, the Linux \"perf\"\n\
profiler will be able to report Python calls. This option is only\n\
available on some platforms and will do nothing if is not supported\n\
on the current system. The default value is \"off\".\n\
-X frozen_modules=[on|off]: whether or not frozen modules should be used.\n\
The default is \"on\" (or \"off\" if you are running a local build).\n\
\n\
The default is \"on\" (or \"off\" if you are running a local build).\n\
-X int_max_str_digits=number: limit the size of int<->str conversions.\n\
This helps avoid denial of service attacks when parsing untrusted data.\n\
The default is sys.int_info.default_max_str_digits. 0 disables.\n\
\n\
This helps avoid denial of service attacks when parsing untrusted\n\
data. The default is sys.int_info.default_max_str_digits.\n\
0 disables.\n\
-X cpu_count=[n|default]: Override the return value of os.cpu_count(),\n\
os.process_cpu_count(), and multiprocessing.cpu_count(). This can help users who need\n\
to limit resources in a container."

os.process_cpu_count(), and multiprocessing.cpu_count(). This can\n\
help users who need to limit resources in a container."
#ifdef Py_STATS
"\n\
\n\
-X pystats: Enable pystats collection at startup."
#endif
#ifdef Py_DEBUG
"\n\
\n\
-X presite=package.module: import this module before site.py is run."
#endif
;

/* Envvars that don't have equivalent command-line options are listed first */
static const char usage_envvars[] =
"Environment variables that change behavior:\n"
"PYTHONSTARTUP: file executed on interactive startup (no default)\n"
"PYTHONPATH : '%lc'-separated list of directories prefixed to the\n"
" default module search path. The result is sys.path.\n"
"PYTHONHOME : alternate <prefix> directory (or <prefix>%lc<exec_prefix>).\n"
" The default module search path uses %s.\n"
"PYTHONPLATLIBDIR : override sys.platlibdir.\n"
"PYTHONCASEOK : ignore case in 'import' statements (Windows).\n"
"PYTHONUTF8: if set to 1, enable the UTF-8 mode.\n"
"PYTHONSTARTUP : file executed on interactive startup (no default)\n"
"PYTHONPATH : '%lc'-separated list of directories prefixed to the\n"
" default module search path. The result is sys.path.\n"
"PYTHONHOME : alternate <prefix> directory (or <prefix>%lc<exec_prefix>).\n"
" The default module search path uses %s.\n"
"PYTHONPLATLIBDIR: override sys.platlibdir.\n"
"PYTHONCASEOK : ignore case in 'import' statements (Windows).\n"
"PYTHONUTF8 : if set to 1, enable the UTF-8 mode.\n"
"PYTHONIOENCODING: Encoding[:errors] used for stdin/stdout/stderr.\n"
"PYTHONFAULTHANDLER: dump the Python traceback on fatal errors.\n"
"PYTHONHASHSEED: if this variable is set to 'random', a random value is used\n"
" to seed the hashes of str and bytes objects. It can also be set to an\n"
" integer in the range [0,4294967295] to get hash values with a\n"
" predictable seed.\n"
"PYTHONHASHSEED : if this variable is set to 'random', a random value is used\n"
" to seed the hashes of str and bytes objects. It can also be\n"
" set to an integer in the range [0,4294967295] to get hash\n"
" values with a predictable seed.\n"
"PYTHONINTMAXSTRDIGITS: limits the maximum digit characters in an int value\n"
" when converting from a string and when converting an int back to a str.\n"
" A value of 0 disables the limit. Conversions to or from bases 2, 4, 8,\n"
" 16, and 32 are never limited.\n"
"PYTHONMALLOC: set the Python memory allocators and/or install debug hooks\n"
" on Python memory allocators. Use PYTHONMALLOC=debug to install debug\n"
" hooks.\n"
" when converting from a string and when converting an int\n"
" back to a str. A value of 0 disables the limit.\n"
" Conversions to or from bases 2, 4, 8, 16, and 32 are never\n"
" limited.\n"
"PYTHONMALLOC : set the Python memory allocators and/or install debug hooks\n"
" on Python memory allocators. Use PYTHONMALLOC=debug to\n"
" install debug hooks.\n"
"PYTHONCOERCECLOCALE: if this variable is set to 0, it disables the locale\n"
" coercion behavior. Use PYTHONCOERCECLOCALE=warn to request display of\n"
" locale coercion and locale compatibility warnings on stderr.\n"
" coercion behavior. Use PYTHONCOERCECLOCALE=warn to request\n"
" display of locale coercion and locale compatibility warnings\n"
" on stderr.\n"
"PYTHONBREAKPOINT: if this variable is set to 0, it disables the default\n"
" debugger. It can be set to the callable of your debugger of choice.\n"
" debugger. It can be set to the callable of your debugger of\n"
" choice.\n"
"PYTHON_CPU_COUNT: Overrides the return value of os.process_cpu_count(),\n"
" os.cpu_count(), and multiprocessing.cpu_count() if set to a positive integer.\n"
"PYTHONDEVMODE: enable the development mode.\n"
" os.cpu_count(), and multiprocessing.cpu_count() if set to\n"
" a positive integer.\n"
"PYTHONDEVMODE : enable the development mode.\n"
"PYTHONPYCACHEPREFIX: root directory for bytecode cache (pyc) files.\n"
"PYTHONWARNDEFAULTENCODING: enable opt-in EncodingWarning for 'encoding=None'.\n"
"PYTHONNODEBUGRANGES: if this variable is set, it disables the inclusion of the \n"
" tables mapping extra location information (end line, start column offset \n"
" and end column offset) to every instruction in code objects. This is useful \n"
" when smaller code objects and pyc files are desired as well as suppressing the \n"
" extra visual location indicators when the interpreter displays tracebacks.\n"
"PYTHON_FROZEN_MODULES : if this variable is set, it determines whether or not \n"
" frozen modules should be used. The default is \"on\" (or \"off\" if you are \n"
" running a local build).\n"
"PYTHON_COLORS : If this variable is set to 1, the interpreter will"
" colorize various kinds of output. Setting it to 0 deactivates this behavior.\n"
"PYTHON_HISTORY : the location of a .python_history file.\n"
"These variables have equivalent command-line parameters (see --help for details):\n"
"PYTHONDEBUG : enable parser debug mode (-d)\n"
"PYTHONDONTWRITEBYTECODE : don't write .pyc files (-B)\n"
"PYTHONINSPECT : inspect interactively after running script (-i)\n"
"PYTHONINTMAXSTRDIGITS : limit max digit characters in an int value\n"
" (-X int_max_str_digits=number)\n"
"PYTHONNOUSERSITE : disable user site directory (-s)\n"
"PYTHONOPTIMIZE : enable level 1 optimizations (-O)\n"
"PYTHONSAFEPATH : don't prepend a potentially unsafe path to sys.path (-P)\n"
"PYTHONUNBUFFERED : disable stdout/stderr buffering (-u)\n"
"PYTHONVERBOSE : trace import statements (-v)\n"
"PYTHONWARNINGS=arg : warning control (-W arg)\n"
"PYTHONNODEBUGRANGES: if this variable is set, it disables the inclusion of\n"
" the tables mapping extra location information (end line,\n"
" start column offset and end column offset) to every\n"
" instruction in code objects. This is useful when smaller\n"
" code objects and pyc files are desired as well as\n"
" suppressing the extra visual location indicators when the\n"
" interpreter displays tracebacks.\n"
"PYTHON_FROZEN_MODULES: if this variable is set, it determines whether or not\n"
" frozen modules should be used. The default is \"on\" (or\n"
" \"off\" if you are running a local build).\n"
"PYTHON_COLORS : if this variable is set to 1, the interpreter will colorize\n"
" various kinds of output. Setting it to 0 deactivates\n"
" this behavior.\n"
"PYTHON_HISTORY : the location of a .python_history file.\n"
"\n"
"These variables have equivalent command-line options (see --help for details):\n"
"PYTHONDEBUG : enable parser debug mode (-d)\n"
"PYTHONDONTWRITEBYTECODE: don't write .pyc files (-B)\n"
"PYTHONINSPECT : inspect interactively after running script (-i)\n"
"PYTHONINTMAXSTRDIGITS: limit max digit characters in an int value\n"
" (-X int_max_str_digits=number)\n"
"PYTHONNOUSERSITE: disable user site directory (-s)\n"
"PYTHONOPTIMIZE : enable level 1 optimizations (-O)\n"
"PYTHONSAFEPATH : don't prepend a potentially unsafe path to sys.path.\n"
"PYTHONUNBUFFERED: disable stdout/stderr buffering (-u)\n"
"PYTHONVERBOSE : trace import statements (-v)\n"
"PYTHONWARNINGS=arg: warning control (-W arg)\n"
#ifdef Py_STATS
"PYTHONSTATS : turns on statistics gathering\n"
"PYTHONSTATS : turns on statistics gathering\n"
#endif
#ifdef Py_DEBUG
"PYTHON_PRESITE=pkg.mod : import this module before site.py is run\n"
"PYTHON_PRESITE=pkg.mod: import this module before site.py is run\n"
#endif
;

Expand Down Expand Up @@ -2387,9 +2385,9 @@ static void
config_complete_usage(const wchar_t* program)
{
config_usage(0, program);
puts("\n");
putchar('\n');
config_envvars_usage();
puts("\n");
putchar('\n');
config_xoptions_usage();
}

Expand Down

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