Institute of Mathematics and University of Stuttgart

liquidSVM for Python

liquidSVM for Python

Welcome to the Python bindings for liquidSVM.


Then to try it out issue on the command line

python -m liquidSVM covtype.1000 mc --display=1

NOTE: it might be possible that there is a problem with the last line if there are files called liquidSVM* in the current directory, so change to some other or a newly created one.

Or use it in an interactive shell

from liquidSVM import *
model = mcSVM(iris, iris_labs, display=1,threads=2)
result, err = model.test(iris, iris_labs)
result = model.predict(iris)

reg = LiquidData('reg-1d')
model = lsSVM(reg.test, display=1)
result, err = model.test(reg.test)

More Information can be found in the demo [jupyter notebook] and in

from liquidSVM import *

Both liquidSVM and these bindings are provided under the AGPL 3.0 license.

Native Library Compilation

liquidSVM is implemented in C++ therefore a native library needs to be compiled and included in the Python process. Binaries for Windows are included, however if it is possible for you, we recommend you compile it for every machine to get full performance.

To set compiler options use the the environment variable LIQUIDSVM_CONFIGURE_ARGS. The first word in it can be any of the following:

usually the fastest, but the resulting library is usually not portable to other machines.
should be portable to most machines, yet slower (factor 2 to 4?)
compiles with debugging activated (can be debugged e.g. with gdb)
No special compilation options activated.

The remainder of the environment variable will be passed to the compiler. Extract and change into the directory. On Linux and MacOS X command line use for instance:

LIQUIDSVM_CONFIGURE_ARGS="native -mavx2" python bdist
LIQUIDSVM_CONFIGURE_ARGS=generic python bdist

Install Xcode and then the optional command line tools are installed from therein.


If you have VisualStudio installed then you should have an environment variable like %VS90COMNTOOLS% (for VisualStudio 2015). Still it seems that needs to have this information in %VS90COMNTOOLS% so copy that environment variable or use for example:


Note: At the moment the Visual Studio for Python only gives Version 9.0 and this is too old for compilation.