symengine.py v0.2.0

[Isuru Fernando]

symengine.py v0.2.0 has been released. You can try it out by doing

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

or if you are on ubuntu 14.04 or 15.10 or 16.04

add-apt-repository ppa:symengine/ppa
apt-get update
apt-get install python-symengine       # or python3-symengine if using python3

You can also install via pip if you have libsymengine and other dependencies installed. See README.md for more info.

This version has a sympy compatibility layer you can import by doing

from symengine.sympy_compat import *

We also have an experimental setup for using symengine within sympy. By setting env var USE_SYMENGINE=1, sympy.physics.mechanics will switch to using symengine as the backend instead of sympy once PR#11002 is merged in. We hope to get more submodules to optionally use symengine.

Please let us know if you run into any trouble installing or using symengine.


Regards,

Isuru Fernando

[Miles]

Hi Isuru,

I am on a Windows 10 with Python 2.7.12, Anaconda 4.3.9 (64-bit) and trying to install symengine using:

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

And I get the following error in the command prompt:

UnsatisfiableError: The following specifications were found to be in conflict:
  - python 2.7*
  - python-symengine -> python 3.5*
Use "conda info <package>" to see the dependencies for each package.

Any ideas what the problem might be? As another data point, when trying pip install symengine I get:

Collecting symengine
  Using cached symengine-0.2.0.tar.gz
Building wheels for collected packages: symengine
  Running setup.py bdist_wheel for symengine ... error
  Complete output from command c:\users\miles\anaconda2\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\miles\\appdata\\local\\temp\\pip-build-1nl9hj\\symengine\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d c:\users\miles\appdata\local\temp\tmp0qzblepip-wheel- --python-tag cp27:
  running bdist_wheel
  running build
  -- The C compiler identification is unknown
  -- The CXX compiler identification is unknown
  CMake Error at CMakeLists.txt:2 (project):
    No CMAKE_C_COMPILER could be found.






  CMake Error at CMakeLists.txt:2 (project):
    No CMAKE_CXX_COMPILER could be found.






  -- Configuring incomplete, errors occurred!
  See also "C:/Users/miles/AppData/Local/Temp/pip-build-1nl9hj/symengine/CMakeFiles/CMakeOutput.log".
  See also "C:/Users/miles/AppData/Local/Temp/pip-build-1nl9hj/symengine/CMakeFiles/CMakeError.log".
  Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "c:\users\miles\appdata\local\temp\pip-build-1nl9hj\symengine\setup.py", line 202, in <module>
      'Programming Language :: Python :: 3.5',
    File "c:\users\miles\anaconda2\lib\distutils\core.py", line 151, in setup
      dist.run_commands()
    File "c:\users\miles\anaconda2\lib\distutils\dist.py", line 953, in run_commands
      self.run_command(cmd)
    File "c:\users\miles\anaconda2\lib\distutils\dist.py", line 972, in run_command
      cmd_obj.run()
    File "c:\users\miles\anaconda2\lib\site-packages\wheel\bdist_wheel.py", line 179, in run
      self.run_command('build')
    File "c:\users\miles\anaconda2\lib\distutils\cmd.py", line 326, in run_command
      self.distribution.run_command(command)
    File "c:\users\miles\anaconda2\lib\distutils\dist.py", line 972, in run_command
      cmd_obj.run()
    File "c:\users\miles\appdata\local\temp\pip-build-1nl9hj\symengine\setup.py", line 110, in run
      self.cmake_build()
    File "c:\users\miles\appdata\local\temp\pip-build-1nl9hj\symengine\setup.py", line 87, in cmake_build
      raise EnvironmentError("error calling cmake")
  EnvironmentError: error calling cmake


  ----------------------------------------
  Failed building wheel for symengine
  Running setup.py clean for symengine
Failed to build symengine
Installing collected packages: symengine
  Running setup.py install for symengine ... error
    Complete output from command c:\users\miles\anaconda2\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\miles\\appdata\\local\\temp\\pip-build-1nl9hj\\symengine\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record c:\users\miles\appdata\local\temp\pip-ptswk6-record\install-record.txt --single-version-externally-managed --compile:
    running install
    running build
    -- The C compiler identification is unknown
    -- The CXX compiler identification is unknown
    CMake Error at CMakeLists.txt:2 (project):
      No CMAKE_C_COMPILER could be found.






    CMake Error at CMakeLists.txt:2 (project):
      No CMAKE_CXX_COMPILER could be found.






    -- Configuring incomplete, errors occurred!
    See also "C:/Users/miles/AppData/Local/Temp/pip-build-1nl9hj/symengine/CMakeFiles/CMakeOutput.log".
    See also "C:/Users/miles/AppData/Local/Temp/pip-build-1nl9hj/symengine/CMakeFiles/CMakeError.log".
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "c:\users\miles\appdata\local\temp\pip-build-1nl9hj\symengine\setup.py", line 202, in <module>
        'Programming Language :: Python :: 3.5',
      File "c:\users\miles\anaconda2\lib\distutils\core.py", line 151, in setup
        dist.run_commands()
      File "c:\users\miles\anaconda2\lib\distutils\dist.py", line 953, in run_commands
        self.run_command(cmd)
      File "c:\users\miles\anaconda2\lib\distutils\dist.py", line 972, in run_command
        cmd_obj.run()
      File "c:\users\miles\appdata\local\temp\pip-build-1nl9hj\symengine\setup.py", line 171, in run
        _install.run(self)
      File "c:\users\miles\anaconda2\lib\site-packages\setuptools-27.2.0-py2.7.egg\setuptools\command\install.py", line 61, in run
      File "c:\users\miles\anaconda2\lib\distutils\command\install.py", line 563, in run
        self.run_command('build')
      File "c:\users\miles\anaconda2\lib\distutils\cmd.py", line 326, in run_command
        self.distribution.run_command(command)
      File "c:\users\miles\anaconda2\lib\distutils\dist.py", line 972, in run_command
        cmd_obj.run()
      File "c:\users\miles\appdata\local\temp\pip-build-1nl9hj\symengine\setup.py", line 110, in run
        self.cmake_build()
      File "c:\users\miles\appdata\local\temp\pip-build-1nl9hj\symengine\setup.py", line 87, in cmake_build
        raise EnvironmentError("error calling cmake")
    EnvironmentError: error calling cmake


    ----------------------------------------
Command "c:\users\miles\anaconda2\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\miles\\appdata\\local\\temp\\pip-build-1nl9hj\\symengine\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record c:\users\miles\appdata\local\temp\pip-ptswk6-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in c:\users\miles\appdata\local\temp\pip-build-1nl9hj\symengine\

Thanks for any help on this. I did make sure CMake is installed, so I'm not sure what the CMake errors are all about.

Miles