Provided by: isympy-common_1.3-2_all bug

NAME

       isympy - interactive shell for SymPy

SYNOPSIS

       isympy [-c | --console] [-p ENCODING | --pretty ENCODING] [-t TYPE | --types TYPE] [-o
              ORDER | --order ORDER] [-q | --quiet] [-d | --doctest] [-C | --no-cache] [-a |
              --auto] [-D | --debug] [ -- | PYTHONOPTIONS]
       isympy [ {-h | --help} | {-v | --version} ]

DESCRIPTION

       isympy is a Python shell for SymPy. It is just a normal python shell (ipython shell if you
       have the ipython package installed) that executes the following commands so that you don't
       have to:

       >>> from __future__ import division
       >>> from sympy import *
       >>> x, y, z = symbols("x,y,z")
       >>> k, m, n = symbols("k,m,n", integer=True)

       So  starting  isympy is equivalent to starting python (or ipython) and executing the above
       commands by hand. It is intended for easy and quick experimentation with SymPy.  For  more
       complicated  programs,  it  is  recommended to write a script and import things explicitly
       (using the "from sympy import sin, log, Symbol, ..." idiom).

OPTIONS

       -c SHELL, --console=SHELL
              Use the specified shell (python or ipython)  as  console  backend  instead  of  the
              default one (ipython if present or python otherwise).

              Example: isympy -c python

              SHELL could be either 'ipython' or 'python'

       -p ENCODING, --pretty=ENCODING
              Setup  pretty  printing  in SymPy. By default, the most pretty, unicode printing is
              enabled (if the terminal supports it). You  can  use  less  pretty  ASCII  printing
              instead or no pretty printing at all.

              Example: isympy -p no

              ENCODING must be one of 'unicode', 'ascii' or 'no'.

       -t TYPE, --types=TYPE
              Setup  the  ground  types  for the polys. By default, gmpy ground types are used if
              gmpy2 or gmpy is installed, otherwise it falls back to python ground  types,  which
              are  a  little bit slower. You can manually choose python ground types even if gmpy
              is installed (e.g., for testing purposes).

              Note that sympy ground types are  not  supported,  and  should  be  used  only  for
              experimental purposes.

              Note  that  the  gmpy1 ground type is primarily intended for testing; it the use of
              gmpy even if gmpy2 is available.

              This is the same as setting the  environment  variable  SYMPY_GROUND_TYPES  to  the
              given ground type (e.g., SYMPY_GROUND_TYPES='gmpy')

              The   ground   types   can   be   determined   interactively   from   the  variable
              sympy.polys.domains.GROUND_TYPES inside the isympy shell itself.

              Example: isympy -t python

              TYPE must be one of 'gmpy', 'gmpy1' or 'python'.

       -o ORDER, --order=ORDER
              Setup the ordering of terms for printing. The default is lex,  which  orders  terms
              lexicographically  (e.g.,  x**2  +  x + 1). You can choose other orderings, such as
              rev-lex, which will use reverse lexicographic ordering (e.g., 1 + x + x**2).

              Note  that  for  very  large  expressions,  ORDER='none'  may  speed  up   printing
              considerably,  with  the  tradeoff  that  the  order  of  the  terms in the printed
              expression will have no canonical order

              Example: isympy -o rev-lax

              ORDER must be one of  'lex',  'rev-lex',  'grlex',  'rev-grlex',  'grevlex',  'rev-
              grevlex', 'old', or 'none'.

       -q, --quiet
              Print only Python's and SymPy's versions to stdout at startup, and nothing else.

       -d, --doctest
              Use the same format that should be used for doctests. This is equivalent to 'isympy
              -c python -p no'.

       -C, --no-cache
              Disable the caching mechanism. Disabling the cache may slow certain operations down
              considerably.  This  is  useful  for testing the cache, or for benchmarking, as the
              cache can result in deceptive benchmark timings.

              This is the same as setting the environment variable SYMPY_USE_CACHE to 'no'.

       -a, --auto
              Automatically create missing symbols. Normally, typing a name of a Symbol that  has
              not  been  instantiated  first would raise NameError, but with this option enabled,
              any undefined name will be automatically created as a Symbol. This  only  works  in
              IPython 0.11.

              Note  that  this  is  intended  only  for interactive, calculator style usage. In a
              script that uses SymPy, Symbols should be instantiated at the  top,  so  that  it's
              clear what they are.

              This  will  not  override  any  names  that are already defined, which includes the
              single character letters represented by the mnemonic QCOSINE (see the "Gotchas  and
              Pitfalls"  document  in  the  documentation).  You  can  delete  existing  names by
              executing "del name" in the shell itself. You can see  if  a  name  is  defined  by
              typing "'name' in globals()".

              The  Symbols  that are created using this have default assumptions.  If you want to
              place assumptions on symbols, you should create them using symbols() or var().

              Finally, this only works in the top level namespace. So, for example, if you define
              a function in isympy with an undefined Symbol, it will not work.

       -D, --debug
              Enable  debugging  output.  This  is  the  same as setting the environment variable
              SYMPY_DEBUG to 'True'. The debug status is set in the variable  SYMPY_DEBUG  within
              isympy.

       -- PYTHONOPTIONS
              These  options will be passed on to ipython (1) shell.  Only supported when ipython
              is being used (standard python shell not supported).

              Two dashes (--) are required  to  separate  PYTHONOPTIONS  from  the  other  isympy
              options.

              For example, to run iSymPy without startup banner and colors:

              isympy -q -c ipython -- --colors=NoColor

       -h, --help
              Print help output and exit.

       -v, --version
              Print isympy version information and exit.

FILES

       ${HOME}/.sympy-history
              Saves the history of commands when using the python shell as backend.

BUGS

       The  upstreams  BTS  can be found at ⟨https://github.com/sympy/sympy/issues⟩ Please report
       all bugs that you find in there, this will help improve the overall quality of SymPy.

SEE ALSO

       ipython(1), python(1)

                                            2007-10-8                                   isympy(1)