随笔档案

I have successfully run your code after doing the following two steps:

1. Download GLPK from

   http://sourceforge.net/projects/winglpk/files/latest/download (as mentioned by oyvind)

2. Unzip it into (for example) : C:\glpk_is_here\

3. Add GLPK binaries to your system path before running python C:\>set PATH=%PATH%;C:\glpk_is_here\glpk-4.55\w64

4. Using the same cmd window from (3), use python/ipython to run your code:
   C:\>ipython your_code.py

5. See the results Out[4]: 2.0

Good luck.