Question

在OS X上安装SCIP Optimization Suite后，编译源代码并安装Cython，

make
make install INSTALLDIR="/usr/local/"
make SHARED=true GMP=false READLINE=false scipoptlib
pip install Cython

尝试安装PySCIPOpt

git clone https://github.com/SCIP-Interfaces/PySCIPOpt.git
cd PySCIPOpt
$ SCIPOPTDIR=./ python setup.py install

但是这给了一个错误。有什么建议吗？

Traceback (most recent call last):
File "setup.py", line 29, in <module>
scipsrcdir = sorted(scipsrcdir)[-1]  # use the latest version
IndexError: list index out of range

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的问题

成功安装pyscipopt后，使用

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from pyscipopt.scip import Model

我收到Library not loaded错误

  File "test.py", line 1, in <module>
    from pyscipopt import Model
  File "/Users/test/anaconda/envs/test/lib/python2.7/site-packages/pyscipopt/__init__.py", line 3, in <module>
    from pyscipopt.scip      import Model
ImportError: dlopen(/Users/test/anaconda/envs/test/lib/python2.7/site-packages/pyscipopt/scip.so, 2): Library not loaded: lib/libscipopt-3.2.1.darwin.x86_64.gnu.opt.so
  Referenced from: /Users/test/anaconda/envs/test/lib/python2.7/site-packages/pyscipopt/scip.so
  Reason: image not found

经过一番搜索，我尝试了某人的解决方案：

export DYLD_LIBRARY_PATH=/path/to/scipoptsuite-3.2.1/lib

但再次运行Python文件会产生不同的错误Symbol not found: _history_length

Traceback (most recent call last):
  File "test.py", line 1, in <module>
    from pyscipopt import Model
  File "/Users/test/anaconda/envs/test/lib/python2.7/site-packages/pyscipopt/__init__.py", line 3, in <module>
    from pyscipopt.scip      import Model
ImportError: dlopen(/Users/test/anaconda/envs/test/lib/python2.7/site-packages/pyscipopt/scip.so, 2): Symbol not found: _history_length
  Referenced from: /Users/test/Desktop/scipoptsuite-3.2.1/lib/libscipopt-3.2.1.darwin.x86_64.gnu.opt.so
  Expected in: flat namespace
 in /Users/test/Desktop/scipoptsuite-3.2.1/lib/libscipopt-3.2.1.darwin.x86_64.gnu.opt.so

Answer 1

设置SCIPOPTDIR环境变量时，它会查找$ {SCIPOPTDIR} / scip - * / src形式的目录。

您收到该错误，因为您在PySCIPopt.git的新克隆结帐中没有任何与该表单匹配的目录。您需要将该环境变量设置为安装＆＃34; SCIP Optimization Suite＆＃34;的目录。

Answer 2

您需要先安装SCIP。确切地说，SCIP优化套件的共享库。然后必须将环境变量SCIPOPTDIR设置为其根目录 - 而不是Python接口的目录。请仔细按照安装文件中的说明进行操作：https://github.com/SCIP-Interfaces/PySCIPOpt/blob/master/INSTALL.md

在Mac OSX上安装PySCIPOpt时出错

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2 个答案: