Pulp.pulpTestAll() test failed, too many values to unpack
问题 My OS is window 7, Pulp version is 1.6.1, gurobi version is 7.0.1. gurobipy can be successfully imported. pulp.solvers.GUROBI did pass the test, so I could use gurobi. However pulp.solvers.CPLEX_CMD failed. Here is the error message: pulp.pulpTestAll() Testing zero subtraction Testing inconsistant lp solution Testing continuous LP solution Testing maximize continuous LP solution Testing unbounded continuous LP solution Testing Long Names Testing repeated Names Testing zero constraint Testing