NAME

       Python - manual page for vtkPython 3.9.0+ : VTK-Wrapper for Python

DESCRIPTION

       usage:  /usr/bin/../lib/x86_64-linux-gnu/vtkpython  [option] ... [-c cmd | -m mod | file |
       -] [arg] ...  Options and arguments (and corresponding environment  variables):  -b      :
       issue warnings about str(bytes_instance), str(bytearray_instance)

              and comparing bytes/bytearray with str. (-bb: issue errors)

       -B     : don't write .pyc files on import; also PYTHONDONTWRITEBYTECODE=x -c cmd : program
       passed in as string (terminates option list) -d      :  debug  output  from  parser;  also
       PYTHONDEBUG=x  -E     : ignore PYTHON* environment variables (such as PYTHONPATH) -h     :
       print this help message and exit  (also  --help)  -i      :  inspect  interactively  after
       running script; forces a prompt even

              if stdin does not appear to be a terminal; also PYTHONINSPECT=x

       -I      :  isolate  Python  from  the  user's environment (implies -E and -s) -m mod : run
       library  module  as  a  script  (terminates  option  list)  -O      :  remove  assert  and
       __debug__-dependent statements; add .opt-1 before

              .pyc extension; also PYTHONOPTIMIZE=x

       -OO    : do -O changes and also discard docstrings; add .opt-2 before

              .pyc extension

       -q      : don't print version and copyright messages on interactive startup -s     : don't
       add user site directory to sys.path; also PYTHONNOUSERSITE -S     :  don't  imply  'import
       site' on initialization -u     : force the stdout and stderr streams to be unbuffered;

              this option has no effect on stdin; also PYTHONUNBUFFERED=x

       -v     : verbose (trace import statements); also PYTHONVERBOSE=x

              can be supplied multiple times to increase verbosity

       -V     : print the Python version number and exit (also --version)

              when given twice, print more information about the build

       -W arg : warning control; arg is action:message:category:module:lineno

              also PYTHONWARNINGS=arg

       -x      :  skip first line of source, allowing use of non-Unix forms of #!cmd -X opt : set
       implementation-specific option. The following options are available:

       -X faulthandler: enable faulthandler

       -X oldparser: enable the traditional LL(1) parser; also PYTHONOLDPARSER

       -X showrefcount: 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

       -X tracemalloc: 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 -X tracemalloc=NFRAME to start tracing with a  traceback  limit  of
              NFRAME frames

       -X importtime: 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 python3 -X importtime -c 'import asyncio'

       -X dev: enable CPython's "development mode", introducing additional runtime

              checks  which  are  too expensive to be enabled by default. Effect of the developer
              mode:

              * Add default warning filter, as  -W  default  *  Install  debug  hooks  on  memory
              allocators:  see  the  PyMem_SetupDebugHooks() 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

       -X utf8: enable UTF-8 mode for operating system interfaces, overriding the default

              locale-aware mode. -X utf8=0 explicitly disables UTF-8 mode  (even  when  it  would
              otherwise activate automatically)

       -X pycache_prefix=PATH: enable writing .pyc files to a parallel tree rooted at the

              given directory instead of to the code tree

   --check-hash-based-pycs always|default|never:
              control how Python invalidates hash-based .pyc files

       file    :  program  read  from  script  file  -       :  program read from stdin (default;
       interactive mode if a tty) arg ...: arguments passed to program in sys.argv[1:]

       Other environment variables: PYTHONSTARTUP:  file  executed  on  interactive  startup  (no
       default) PYTHONPATH   : ':'-separated list of directories prefixed to the

       default module search path.
              The result is sys.path.

       PYTHONHOME   : alternate <prefix> directory (or <prefix>:<exec_prefix>).

              The default module search path uses <prefix>/lib/pythonX.X.

       PYTHONPLATLIBDIR  :  override  sys.platlibdir.   PYTHONCASEOK  :  ignore  case in 'import'
       statements (Windows).  PYTHONUTF8: if set to 1, enable the UTF-8 mode.   PYTHONIOENCODING:
       Encoding[:errors]  used  for  stdin/stdout/stderr.   PYTHONFAULTHANDLER:  dump  the Python
       traceback on fatal errors.  PYTHONHASHSEED: if this variable is set to 'random', a  random
       value is used

       to seed the hashes of str and bytes objects.
              It can also be set to an

              integer in the range [0,4294967295] to get hash values with a predictable seed.

       PYTHONMALLOC: set the Python memory allocators and/or install debug hooks

              on Python memory allocators. Use PYTHONMALLOC=debug to install debug hooks.

       PYTHONCOERCECLOCALE: if this variable is set to 0, it disables the locale

              coercion  behavior.  Use  PYTHONCOERCECLOCALE=warn  to  request  display  of locale
              coercion and locale compatibility warnings on stderr.

       PYTHONBREAKPOINT: if this variable is set to 0, it disables the default

              debugger. It can be set to the callable of your debugger of choice.

       PYTHONDEVMODE: enable the  development  mode.   PYTHONPYCACHEPREFIX:  root  directory  for
       bytecode cache (pyc) files.

SEE ALSO

       The  full  documentation  for  Python  is maintained as a Texinfo manual.  If the info and
       Python programs are properly installed at your site, the command

              info Python

       should give you access to the complete manual.