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cannot import scipy.optimize.Bounds - Printable Version +- Python Forum (https://python-forum.io) +-- Forum: Python Coding (https://python-forum.io/forum-7.html) +--- Forum: General Coding Help (https://python-forum.io/forum-8.html) +--- Thread: cannot import scipy.optimize.Bounds (/thread-17910.html) |
cannot import scipy.optimize.Bounds - larkypython - Apr-29-2019 I used this: from scipy import optimize then it is ok to use optimize.minimize but cannot use optimize.Bounds , cannot use optimize.LinearConstraint , saying no this modulethen I tried from scipy.optimize import Bounds it will report error so the question is: I don't know how to import the Bounds and Linear Constraint module.... Please help out, thanks! RE: cannot import scipy.optimize.Bounds - larkypython - May-05-2019 I wrote a very simple program to test the optimize of scipy, it all works for unconstrained optimizations, but when it comes to constrained optimization, the Bounds, LinearConstraint module will be needed, but I cannot import any of them. the program is as shown below: from scipy import optimize # from scipy.optimize import minimize # from scipy.optimize import Bounds # from scipy.optimize import LinearConstraint import numpy def f(x): return 0.5*(1-x[0])**2+(x[1]-x[0]**2)**2 bounds = Bounds([0, -0.5], [1.0, 2.0]) result=optimize.minimize(f, [0.5, -0.5], method='BFGS', bounds=bounds) print(result.x)the error says: File "testopt.py", line 13, in <module> bounds = Bounds([0, -0.5], [1.0, 2.0]) NameError: name 'Bounds' is not definedI also tried to import them one by one: from scipy.optimize import minimize from scipy.optimize import Bounds from scipy.optimize import LinearConstraintbut, the error becomes: Traceback (most recent call last): File "testopt.py", line 3, in <module> from scipy.optimize import Bounds ImportError: cannot import name 'Bounds'so no matter what, Bounds and LinearConstraint will never be found. I am wondering what kind of problem will this be, if the installation got problems, the minimize function should not work either. Please help out, this already hindered me for weeks. RE: cannot import scipy.optimize.Bounds - larkypython - May-05-2019 Problem solved, looks like I just need to upgrade scipy from 0.19 to 1.1 or above. |