问题描述
我通过 iPython notebook 和 Python 2.7 在 OS X 上运行 PuLP.glpk 使用 brew install homebrew/science/glpk 安装，PuLP 使用 pip install paste 安装.
I'm running PuLP on OS X via a iPython notebook and Python 2.7. glpk is installed using brew install homebrew/science/glpk and PuLP is installed via pip install pulp.
但是我在 Python 中遇到错误:
However I'm getting the error in Python:
---------------------------------------------------------------------------
PulpSolverError Traceback (most recent call last)
<ipython-input-15-689fef0dd94f> in <module>()
1 # Solve the problem
----> 2 status = prob.solve(GLPK(msg=0))
3
/Users/x/anaconda/envs/data/lib/python2.7/site-packages/pulp/pulp.pyc in solve(self, solver, **kwargs)
1641 #time it
1642 self.solutionTime = -clock()
-> 1643 status = solver.actualSolve(self, **kwargs)
1644 self.solutionTime += clock()
1645 self.restoreObjective(wasNone, dummyVar)
/Users/x/anaconda/envs/data/lib/python2.7/site-packages/pulp/solvers.pyc in actualSolve(self, lp)
364 stderr = pipe)
365 if rc:
--> 366 raise PulpSolverError("PuLP: Error while trying to execute "+self.path)
367 else:
368 if os.name != 'nt':
PulpSolverError: PuLP: Error while trying to execute glpsol
这是触发此错误的代码:
Here's the code that triggers this error:
from pulp import *
#Variables
x = LpVariable('x')
y = LpVariable('y')
# Problem
prob = LpProblem('problem', LpMinimize)
# Constraints
prob += x + y <= 1
prob += x <= 1
prob += -2 + y <= 4
# Objective function to minimize
prob +=
# Solve the problem
status = prob.solve(GLPK(msg=0))
导致错误的原因是什么，如何修复?
What's causing the error, and how can it be fixed?
推荐答案
如果你运行
pulp.pulpTestAll()
你可能会看到这样的一行:
you probably will see a line like this:
Solver pulp.solvers.GLPK_CMD unavailable
如果是这样，你所要做的就是在你的 linux 上安装 glpk-utils 包.如果你成功了，你应该可以调用
If so, all you have to do is to install glpk-utils package on your linux.If you succeeded with it, you should be able to call
glpsol
也来自命令行.
这篇关于PulpSolverError:PuLP:尝试在 Python 2.7 中执行 glpsol 时出错的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！