本文整理汇总了Python中pyscipopt.Model.getSolObjVal方法的典型用法代码示例。如果您正苦于以下问题：Python Model.getSolObjVal方法的具体用法？Python Model.getSolObjVal怎么用？Python Model.getSolObjVal使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类pyscipopt.Model的用法示例。
在下文中一共展示了Model.getSolObjVal方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: getColumnFromMIP
# 需要导入模块: from pyscipopt import Model [as 别名]
# 或者: from pyscipopt.Model import getSolObjVal [as 别名]
def getColumnFromMIP(self, timeLimit):
def getPatternFromSolution(subMIP):
edges = []
for x in subMIP.getVars():
if "x" in x.name:
if subMIP.getVal(x) > 0.99:
i, j = x.name.split("_")[1:]
edges.append((int(i), int(j)))
return edges
# Storing the values of the dual solutions:
dualSols = {}
for c in self.cons:
i = int(c.name.split("_")[-1].strip())
dualSols[i] = self.model.getDualsolLinear(c)
# Model for the sub-problem:
subMIP = Model("VRP-Sub")
subMIP.setPresolve(SCIP_PARAMSETTING.OFF)
subMIP.setMinimize
subMIP.setRealParam("limits/time", timeLimit)
# Binary variables x_ij indicating whether the vehicle
# traverses edge (i, j)
x = {}
for i in self.data.nodes:
for j in self.data.nodes:
if i != j:
x[i, j] = subMIP.addVar(vtype="B", obj=self.data.costs[i, j] - (dualSols[i] if i in self.clientNodes else 0), name="x_%d_%d" % (i, j))
# Non negative variables u_i indicating the demand served up to node i:
u = {}
for i in self.data.nodes:
u[i] = subMIP.addVar(vtype="C", lb=0, ub=self.data.cap, obj=0.0, name="u_%d" % i)
for j in self.clientNodes:
subMIP.addCons(quicksum(x[i, j] for i in self.data.nodes if i != j) <= 1)
for h in self.clientNodes:
subMIP.addCons(quicksum(x[i, h] for i in self.data.nodes if i != h) ==
quicksum(x[h, i] for i in self.data.nodes if i != h))
for i in self.data.nodes:
for j in self.clientNodes:
if i != j:
subMIP.addCons(u[j] >= u[i] + self.data.demands[j]*x[i, j] - self.data.cap*(1 - x[i, j]))
subMIP.addCons(quicksum(x[self.data.depot, j] for j in self.clientNodes) <= 1)
subMIP.hideOutput()
subMIP.optimize()
mipSol = subMIP.getBestSol()
obj = subMIP.getSolObjVal(mipSol)
pattern = getPatternFromSolution(subMIP)
return obj, pattern