pyomo找不到“gurobi”可执行文件

Question

我在让pyomo和gurobi用python进行交互方面遇到了问题。我正在运行一个优化问题，我使用pyomo来构建优化问题本身，然后使用gurobi来解决它。我一直在深入研究这些问题，但不幸的是，我没有成功地找到解决办法。我偶然发现了几个让我困惑的观察结果。这些是：

• 我能够解决gurobi在其网站上提供的一个简单优化问题。有了这个，我相信古罗比已经安装好了
• 我可以将gurobi导入python，但无法从bash中输入gurobi shell（gurobi.sh）。我得到一个（未找到命令-错误）。另一方面，我能够使用grbgetkey命令添加许可证。这表明gurobi没有安装或者路径设置不正确，但我可以将其导入python

我正在运行python2.7、pyomo6.5和gurobi9.1

另外，下面是我的bashrc文件的外观。这有点复杂，但我强烈认为路径设置是正确的

# User specific aliases and functions
export PATH=/usr/local/anaconda27/bin:$PATH
export LD_LIBRARY_PATH=/etc/glad-smail-liberr:$LD_LIBRARY_PATH

#export GUROBI_HOME="/opt/gurobi650/linux64"
export GUROBI_HOME="/usr/local/anaconda27"
export PATH="${PATH}:${GUROBI_HOME}/bin"
export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${GUROBI_HOME}/lib"
export GRB_LICENSE_FILE="${GUROBI_HOME}/lib/gurobi.lic"

在下面，我插入了错误消息：

WARNING:pyomo.solvers:Could not locate the 'gurobi' executable, which is required for solver gurobi
failed
Traceback (most recent call last):
File "scripts/solve_network.py", line 179, in <module>
    solve_model(network)
  File "scripts/solve_network.py", line 106, in solve_model
    network.lopf(network.snapshots,solver_name=solver_name,solver_io=solver_io,solver_options=solver_options,extra_functionality=extra_functionality,keep_files=network.opf_keep_files,formulation=options['formulation'])
  File "/usr/local/anaconda27/lib/python2.7/site-packages/pypsa-0.15.0-py2.7.egg/pypsa/opf.py", line 1673, in network_lopf
    extra_postprocessing=extra_postprocessing)
  File "/usr/local/anaconda27/lib/python2.7/site-packages/pypsa-0.15.0-py2.7.egg/pypsa/opf.py", line 1580, in network_lopf_solve
    network.results = network.opt.solve(*args, suffixes=["dual"], keepfiles=keep_files, logfile=solver_logfile, options=solver_options)
  File "/usr/local/anaconda27/lib/python2.7/site-packages/Pyomo-5.6-py2.7-linux-x86_64.egg/pyomo/opt/base/solvers.py", line 512, in solve
    self.available(exception_flag=True)
  File "/usr/local/anaconda27/lib/python2.7/site-packages/Pyomo-5.6-py2.7-linux-x86_64.egg/pyomo/solvers/plugins/solvers/GUROBI.py", line 155, in available
    val = ILMLicensedSystemCallSolver.available(self, exception_flag)
  File "/usr/local/anaconda27/lib/python2.7/site-packages/Pyomo-5.6-py2.7-linux-x86_64.egg/pyomo/opt/solver/ilmcmd.py", line 36, in available
    if not pyomo.opt.solver.shellcmd.SystemCallSolver.available(self, exception_flag):
  File "/usr/local/anaconda27/lib/python2.7/site-packages/Pyomo-5.6-py2.7-linux-x86_64.egg/pyomo/opt/solver/shellcmd.py", line 126, in available
    raise ApplicationError(msg % self.name)
pyutilib.common._exceptions.ApplicationError: No executable found for solver 'gurobi'

此错误消息清楚地表明，pyomo无法定位gurobi isn安装。但是，我能够在其他不使用pyomo的优化问题中使用gurobi

我真的希望有人能让我走

Answer 1

您的GUROBI_HOME环境变量不正确。正确的路径在上面的行中注释掉：

export GUROBI_HOME="/opt/gurobi650/linux64"

您还应该更新到Python 3-版本2已弃用，不再受支持