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yeli.chen
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add README
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‎g++.help

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g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
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Copyright (C) 2010 Free Software Foundation, Inc.
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This is free software; see the source for copying conditions. There is NO
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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Usage: g++ [options] file...
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Options:
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-pass-exit-codes Exit with highest error code from a phase
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--help Display this information
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--target-help Display target specific command line options
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--help={target|optimizers|warnings|params|[^]{joined|separate|undocumented}}[,...]
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Display specific types of command line options
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(Use '-v --help' to display command line options of sub-processes)
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--version Display compiler version information
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-dumpspecs Display all of the built in spec strings
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-dumpversion Display the version of the compiler
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-dumpmachine Display the compiler's target processor
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-print-search-dirs Display the directories in the compiler's search path
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-print-libgcc-file-name Display the name of the compiler's companion library
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-print-file-name=<lib> Display the full path to library <lib>
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-print-prog-name=<prog> Display the full path to compiler component <prog>
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-print-multi-directory Display the root directory for versions of libgcc
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-print-multi-lib Display the mapping between command line options and
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multiple library search directories
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-print-multi-os-directory Display the relative path to OS libraries
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-print-sysroot Display the target libraries directory
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-print-sysroot-headers-suffix Display the sysroot suffix used to find headers
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-Wa,<options> Pass comma-separated <options> on to the assembler
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-Wp,<options> Pass comma-separated <options> on to the preprocessor
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-Wl,<options> Pass comma-separated <options> on to the linker
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-Xassembler <arg> Pass <arg> on to the assembler
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-Xpreprocessor <arg> Pass <arg> on to the preprocessor
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-Xlinker <arg> Pass <arg> on to the linker
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-combine Pass multiple source files to compiler at once
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-save-temps Do not delete intermediate files
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-pipe Use pipes rather than intermediate files
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-time Time the execution of each subprocess
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-specs=<file> Override built-in specs with the contents of <file>
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-std=<standard> Assume that the input sources are for <standard>
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--sysroot=<directory> Use <directory> as the root directory for headers
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and libraries
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-B <directory> Add <directory> to the compiler's search paths
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-b <machine> Run gcc for target <machine>, if installed
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-V <version> Run gcc version number <version>, if installed
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-v Display the programs invoked by the compiler
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-### Like -v but options quoted and commands not executed
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-E Preprocess only; do not compile, assemble or link
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-S Compile only; do not assemble or link
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-c Compile and assemble, but do not link
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-o <file> Place the output into <file>
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-x <language> Specify the language of the following input files
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Permissible languages include: c c++ assembler none
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'none' means revert to the default behavior of
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guessing the language based on the file's extension
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Options starting with -g, -f, -m, -O, -W, or --param are automatically
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passed on to the various sub-processes invoked by g++. In order to pass
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other options on to these processes the -W<letter> options must be used.
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For bug reporting instructions, please see:
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<http://bugzilla.redhat.com/bugzilla>.

‎gcc.help

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gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
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Copyright (C) 2010 Free Software Foundation, Inc.
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This is free software; see the source for copying conditions. There is NO
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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Usage: gcc [options] file...
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Options:
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-pass-exit-codes Exit with highest error code from a phase
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--help Display this information
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--target-help Display target specific command line options
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--help={target|optimizers|warnings|params|[^]{joined|separate|undocumented}}[,...]
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Display specific types of command line options
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(Use '-v --help' to display command line options of sub-processes)
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--version Display compiler version information
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-dumpspecs Display all of the built in spec strings
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-dumpversion Display the version of the compiler
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-dumpmachine Display the compiler's target processor
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-print-search-dirs Display the directories in the compiler's search path
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-print-libgcc-file-name Display the name of the compiler's companion library
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-print-file-name=<lib> Display the full path to library <lib>
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-print-prog-name=<prog> Display the full path to compiler component <prog>
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-print-multi-directory Display the root directory for versions of libgcc
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-print-multi-lib Display the mapping between command line options and
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multiple library search directories
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-print-multi-os-directory Display the relative path to OS libraries
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-print-sysroot Display the target libraries directory
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-print-sysroot-headers-suffix Display the sysroot suffix used to find headers
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-Wa,<options> Pass comma-separated <options> on to the assembler
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-Wp,<options> Pass comma-separated <options> on to the preprocessor
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-Wl,<options> Pass comma-separated <options> on to the linker
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-Xassembler <arg> Pass <arg> on to the assembler
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-Xpreprocessor <arg> Pass <arg> on to the preprocessor
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-Xlinker <arg> Pass <arg> on to the linker
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-combine Pass multiple source files to compiler at once
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-save-temps Do not delete intermediate files
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-pipe Use pipes rather than intermediate files
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-time Time the execution of each subprocess
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-specs=<file> Override built-in specs with the contents of <file>
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-std=<standard> Assume that the input sources are for <standard>
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--sysroot=<directory> Use <directory> as the root directory for headers
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and libraries
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-B <directory> Add <directory> to the compiler's search paths
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-b <machine> Run gcc for target <machine>, if installed
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-V <version> Run gcc version number <version>, if installed
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-v Display the programs invoked by the compiler
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-### Like -v but options quoted and commands not executed
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-E Preprocess only; do not compile, assemble or link
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-S Compile only; do not assemble or link
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-c Compile and assemble, but do not link
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-o <file> Place the output into <file>
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-x <language> Specify the language of the following input files
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Permissible languages include: c c++ assembler none
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'none' means revert to the default behavior of
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guessing the language based on the file's extension
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Options starting with -g, -f, -m, -O, -W, or --param are automatically
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passed on to the various sub-processes invoked by gcc. In order to pass
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other options on to these processes the -W<letter> options must be used.
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For bug reporting instructions, please see:
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<http://bugzilla.redhat.com/bugzilla>.

‎go.help

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go version go1.5.2 linux/amd64
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Go is a tool for managing Go source code.
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Usage:
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go command [arguments]
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The commands are:
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build compile packages and dependencies
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clean remove object files
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doc show documentation for package or symbol
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env print Go environment information
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fix run go tool fix on packages
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fmt run gofmt on package sources
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generate generate Go files by processing source
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get download and install packages and dependencies
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install compile and install packages and dependencies
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list list packages
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run compile and run Go program
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test test packages
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tool run specified go tool
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version print Go version
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vet run go tool vet on packages
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Use "go help [command]" for more information about a command.
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Additional help topics:
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c calling between Go and C
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buildmode description of build modes
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filetype file types
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gopath GOPATH environment variable
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environment environment variables
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importpath import path syntax
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packages description of package lists
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testflag description of testing flags
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testfunc description of testing functions
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Use "go help [topic]" for more information about that topic.
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‎python.help

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Python 2.7.11
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usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
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Options and arguments (and corresponding environment variables):
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-B : don't write .py[co] files on import; also PYTHONDONTWRITEBYTECODE=x
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-c cmd : program passed in as string (terminates option list)
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-d : debug output from parser; also PYTHONDEBUG=x
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-E : ignore PYTHON* environment variables (such as PYTHONPATH)
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-h : print this help message and exit (also --help)
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-i : inspect interactively after running script; forces a prompt even
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if stdin does not appear to be a terminal; also PYTHONINSPECT=x
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-m mod : run library module as a script (terminates option list)
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-O : optimize generated bytecode slightly; also PYTHONOPTIMIZE=x
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-OO : remove doc-strings in addition to the -O optimizations
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-R : use a pseudo-random salt to make hash() values of various types be
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unpredictable between separate invocations of the interpreter, as
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a defense against denial-of-service attacks
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-Q arg : division options: -Qold (default), -Qwarn, -Qwarnall, -Qnew
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-s : don't add user site directory to sys.path; also PYTHONNOUSERSITE
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-S : don't imply 'import site' on initialization
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-t : issue warnings about inconsistent tab usage (-tt: issue errors)
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-u : unbuffered binary stdout and stderr; also PYTHONUNBUFFERED=x
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see man page for details on internal buffering relating to '-u'
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-v : verbose (trace import statements); also PYTHONVERBOSE=x
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can be supplied multiple times to increase verbosity
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-V : print the Python version number and exit (also --version)
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-W arg : warning control; arg is action:message:category:module:lineno
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-x : skip first line of source, allowing use of non-Unix forms of #!cmd
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-3 : warn about Python 3.x incompatibilities that 2to3 cannot trivially fix
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file : program read from script file
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- : program read from stdin (default; interactive mode if a tty)
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arg ...: arguments passed to program in sys.argv[1:]
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Other environment variables:
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PYTHONSTARTUP: file executed on interactive startup (no default)
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PYTHONPATH : ':'-separated list of directories prefixed to the
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default module search path. The result is sys.path.
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PYTHONHOME : alternate <prefix> directory (or <prefix>:<exec_prefix>).
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The default module search path uses <prefix>/pythonX.X.
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PYTHONCASEOK : ignore case in 'import' statements (Windows).
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PYTHONIOENCODING: Encoding[:errors] used for stdin/stdout/stderr.
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PYTHONHASHSEED: if this variable is set to 'random', the effect is the same
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as specifying the -R option: a random value is used to seed the hashes of
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str, unicode, buffer and datetime objects. It can also be set to an
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integer in the range [0,4294967295] to get hash values with a predictable
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seed.

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