symengine/symengine.py


Python wrappers for SymEngine

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  • Updated at: 2020-05-09 04:49:46

SymEngine Python Wrappers

Python wrappers to the C++ library SymEngine, a fast C++ symbolic manipulation library.

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Installation

Pip

See License section for information about wheels

pip install symengine --user

Conda package manager

conda install python-symengine -c symengine -c conda-forge

optionally, you may choose to install an early developer preview:

conda install python-symengine -c symengine/label/dev -c conda-forge

Build from source

Install prerequisites.

CMake       >= 2.8.7
Python2     >= 2.7      or Python3 >= 3.4
Cython      >= 0.19.1
SymEngine   >= 0.4.0

For SymEngine, only a specific commit/tag (see symengine_version.txt) is supported. Latest git master branch may not work as there may be breaking changes in SymEngine.

Python wrappers can be installed by,

python setup.py install

Additional options to setup.py are

python setup.py install build_ext
    --symengine-dir=/path/to/symengine/install/dir          # Path to SymEngine install directory or build directory
    --compiler=mingw32|msvc|cygwin                          # Select the compiler for Windows
    --generator=cmake-generator                             # CMake Generator
    --build-type=Release|Debug                              # Set build-type for multi-configuration generators like MSVC
    --define="var1=value1;var2=value2"                      # Give options to CMake
    --inplace                                               # Build the extension in source tree

Standard options to setup.py like --user, --prefix can be used to configure install location. NumPy is used if found by default, if you wish to make your choice of NumPy use explicit: then add e.g. WITH_NUMPY=False to --define.

Use SymEngine from Python as follows:

>>> from symengine import var
>>> var("x y z")
(x, y, z)
>>> e = (x+y+z)**2
>>> e.expand()
2*x*y + 2*x*z + 2*y*z + x**2 + y**2 + z**2

You can read Python tests in symengine/tests to see what features are implemented.

License

symengine.py is MIT licensed and uses several LGPL, BSD-3 and MIT licensed libraries

Licenses for the dependencies of pip wheels are as follows,

pip wheels on Unix use GMP (LGPL v3), MPFR (LGPL v3), MPC (LGPL v3), LLVM (NCSA) and symengine (MIT + BSD-3). pip wheels on Windows use MPIR (LGPL v3) instead of GMP above. NumPy (BSD-3) and SymPy (BSD-3) are optional dependencies. Sources for these binary dependencies can be found on https://github.com/symengine/symengine-wheels/releases