glpk

问题 After 3 days, I can't get a python program packaged into a .exe file. I've tried py2exe (which continuously missed modules), and PyInstaller. Here's the complicated part. My program uses a lot of additional installed modules (coopr, pyomo, openpyxl, glpk, cbc, pyutilib, numpy, etc.). These in turn import all kinds of other things, and I can't track it down (the PyInstaller warning log lists 676 lines of missing or potentially unneeded modules.) However, I've gotten (by adding imports of

问题 After 3 days, I can't get a python program packaged into a .exe file. I've tried py2exe (which continuously missed modules), and PyInstaller. Here's the complicated part. My program uses a lot of additional installed modules (coopr, pyomo, openpyxl, glpk, cbc, pyutilib, numpy, etc.). These in turn import all kinds of other things, and I can't track it down (the PyInstaller warning log lists 676 lines of missing or potentially unneeded modules.) However, I've gotten (by adding imports of

问题 I'm trying to use the GLPK solver with Pyomo. I have a working model that's been tested, but keep getting an error saying GLPK can't be found. WARNING: Could not locate the 'glpsol' executable, which is required for solver 'glpk' I've installed glpk sucessfully. I also added the directory to my path variable so the executed can be called globally. I tested this with glpsol --help from my command line, and see the help info printed. The below thread says it should be working, but alas, it is

问题 I'm trying to use the GLPK solver with Pyomo. I have a working model that's been tested, but keep getting an error saying GLPK can't be found. WARNING: Could not locate the 'glpsol' executable, which is required for solver 'glpk' I've installed glpk sucessfully. I also added the directory to my path variable so the executed can be called globally. I tested this with glpsol --help from my command line, and see the help info printed. The below thread says it should be working, but alas, it is

问题 I'm trying to install glpk using pip on a virtual enviroment but it keeps giving this error regarding the wheels for pip installing "ERROR: Could not build wheels for glpk which use PEP 517 and cannot be installed directly": $ pip install glpk Collecting glpk Using cached glpk-0.4.5.tar.gz (152 kB) Installing build dependencies ... done Getting requirements to build wheel ... done Preparing wheel metadata ... done Building wheels for collected packages: glpk Building wheel for glpk (PEP 517)

来源： https://stackoverflow.com/questions/62140335/multiplication-of-two-variables-for-linear-problems-in-glpk-gusek

来源： https://stackoverflow.com/questions/58825442/how-can-i-write-an-if-condition-for-my-decision-variable-for-mixed-integer-linea

来源： https://stackoverflow.com/questions/58825442/how-can-i-write-an-if-condition-for-my-decision-variable-for-mixed-integer-linea

问题 Im using GLPK with through Julia, and I need to optimize the same GLPK.Prob repeatedly. What changes between each optimization is that some combination of variables gets fixed to 0 simply put in pseudocode lp = GLPK.Prob() variables_to_block = [[1,2,3], [2,3], [6,7], [19,100,111]...] for i in variables_to_block block_vars(lp, i) simplex(lp) restore_vars(lp, i) end when I then run this, it looks like CPU1 acts as a scheduler, staying in the 9-11% range, and the load on CPU3 and CPU4 alternates

问题 I followed these steps and got my first error: wget http://www.dcc.fc.up.pt/~jpp/code/python-glpk/python-glpk_0.4.43.orig.tar.gz tar -xzf python-glpk_0.4.43.orig.tar.gz cd python-glpk-0.4.43/src/ sudo make install I got this error: make -C swig all make[1]: pyversions: Command not found gcc -Wall -c -fPIC glpkpi_wrap.c -DHAVE_CONFIG_H -I/usr/include/ -I/usr/lib//config glpkpi_wrap.c:130:11: fatal error: 'Python.h' file not found # include <Python.h> ^ 1 error generated. make[1]: *** [glpkpi