如何在python中使用PuLP索引约束

Question

I would like to index the constraints in the CPLEX lp file like below: 我想索引CPLEX lp文件中的约束，如下所示：

_20160421_LHRSINBA0011_Cap#0:   X_20160421_LHRSIN00001_50454 <= 234.5
_20160421_LHRSINBA0015_Cap#1:   X_20160421_LHRSIN00002_50464 + X_20160421_LHRSYD00001_60314 <= 114.5

But I don't know how to do it with PuLP. 但是我不知道如何使用PuLP。

Answer 1

If by indexing you mean change the name of each of the constraints so that you can retrieve them easily then it's simple: 如果通过索引意味着更改每个约束的名称，以便可以轻松检索它们，那么很简单：

problem += X_20160421_LHRSIN00001_50454 <= 234.5, "_20160421_LHRSINBA0011_Cap#0"
problem += X_20160421_LHRSIN00002_50464 + X_20160421_LHRSYD00001_60314 <= 114.5, "_20160421_LHRSINBA0015_Cap#1"

Then when you're searching for a particular constraint, you can use: 然后，当您搜索特定约束时，可以使用：

[constraint for (c_name, constraint) in problem.constraints.items() if "_Cap#1" in c_name]

如何在python中使用PuLP索引约束

问题描述

1 个解决方案

解决方案1
0 2017-01-03 20:47:05

如何在python中使用PuLP索引约束

问题描述

1 个解决方案

解决方案1 0 2017-01-03 20:47:05

解决方案1
0 2017-01-03 20:47:05