The recommended way to install COMPAS is to use Anaconda/conda
$ conda config --add channels conda-forge $ conda install COMPAS
To verify your setup, start Python from the command line and run the following:
>>> import compas >>> import compas_rhino >>> import compas_blender >>> import compas_ghpython
COMPAS is still under very active development, with new versions being released frequently. Updating your installation to the latest version is easy.
$ conda update COMPAS
update command doen’t always work as expected.
If you know to which version to upgrade, just do
conda install COMPAS=0.7.0
One of the reasons to use virtual environments is to isolate dependencies, to be able to create a fully reproducible setup, and to be able to work with different versions of Python and/or different versions and combinations of packages.
For example, if you work on a project that requires a specific version of Python or a specific version of a package that is incompatible with the ones required by another project, you can use environments to make sure both projects can run side-by-side without constantly having to update your entire development setup.
Create an environment named “compas-dev”.
$ conda create -n compas-dev
Create an environment with a specific version of Python
$ conda create -n compas-dev python=3.6
Install COMPAS (or other packages) for this environment
$ conda install -n compas-dev COMPAS=0.6.2
For further instructions about managing virtual environments with conda see the docs.
In any case, don’t forget to activate the envirnment when you want to use the installed functionality.
$ conda activate compas-dev
Problem You get an error similar to the following when trying to run anything involving a Plotter (or even just matplotlib)
2019-04-02 16:10:39.181 python[2619:857913] -[NSApplication _setup:]: unrecognized selector sent to instance 0x7f8c389244b0 2019-04-02 16:10:39.183 python[2619:857913] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSApplication _setup:]: unrecognized selector sent to instance 0x7f8c389244b0' *** First throw call stack: ( 0 CoreFoundation 0x00007fff33adbecd __exceptionPreprocess + 256 1 libobjc.A.dylib 0x00007fff5fba3720 objc_exception_throw + 48 2 CoreFoundation 0x00007fff33b59275 -[NSObject(NSObject) __retain_OA] + 0 3 CoreFoundation 0x00007fff33a7db40 ___forwarding___ + 1486 4 CoreFoundation 0x00007fff33a7d4e8 _CF_forwarding_prep_0 + 120 5 libtk8.6.dylib 0x000000011c566154 TkpInit + 324 6 libtk8.6.dylib 0x000000011c4be0ee Initialize + 2622 7 _tkinter.cpython-37m-darwin.so 0x0000000118bf3a3f _tkinter_create + 1183 8 python 0x000000010a706fe6 _PyMethodDef_RawFastCallKeywords + 230 9 python 0x000000010a8438b2 call_function + 306 10 python 0x000000010a841565 _PyEval_EvalFrameDefault + 46165 ... 60 python 0x000000010a6d942d main + 125 61 libdyld.dylib 0x00007fff60c71ed9 start + 1 62 ??? 0x0000000000000002 0x0 + 2 ) libc++abi.dylib: terminating with uncaught exception of type NSException Abort trap: 6
Solution Install python.app
The default python provided in (Ana)conda is not a framework build.
However, a framework build can easily be installed,
both in the main environment and in conda envs:
install python.app (
conda install python.app)
pythonw rather than
To install python.app when you create an environment do
$ conda create -n compas-dev -c conda-forge python=3.7 python.app COMPAS
To install python.app in an already existing environment
$ conda activate compas-dev $ conda install python.app