Python: Least Squares Support Vector Machine (LS-SVM)
There is a package called FukuML.

In their description (Version 0.4.1) they write:


Support Vector Machine


Primal Hard Margin Support Vector Machine Binary Classification Learning Algorithm
Dual Hard Margin Support Vector Machine Binary Classification Learning Algorithm
Polynomial Kernel Support Vector Machine Binary Classification Learning Algorithm
Gaussian Kernel Support Vector Machine Binary Classification Learning Algorithm
Soft Polynomial Kernel Support Vector Machine Binary Classification Learning Algorithm
Soft Gaussian Kernel Support Vector Machine Binary Classification Learning Algorithm
Polynomial Kernel Support Vector Machine Multi Classification Learning Algorithm
Gaussian Kernel Support Vector Machine Multi Classification Learning Algorithm
Soft Polynomial Kernel Support Vector Machine Multi Classification Learning Algorithm
Soft Gaussian Kernel Support Vector Machine Multi Classification Learning Algorithm
Probabilistic Support Vector Machine Learning Algorithm
Least Squares Support Vector Machine Binary Classification Learning Algorithm
Least Squares Support Vector Machine Multi Classification Learning Algorithm
Support Vector Regression Learning Algorithm



As you can see, they have the feature you're after.