python-lmfit 1.0.2 Least-Squares minimization with bounds and constraints
Lmfit provides a high-level interface to non-linear optimization and curve fitting problems for Python. It builds on and extends many of the optimization methods of
scipy.optimize. Initially inspired by (and named for) extending the Levenberg-Marquardt method from
scipy.optimize.leastsq, lmfit now provides a number of useful enhancements to optimization and data fitting problems.