如何正确pip install pyscipopt

1、看错误日志，如果出现了：

error: Microsoft Visual C++ 14.0 is required
看这篇博文解决方案，下载对应的版本就好了（注意：要细看评论区的内容）
我选择了百度网盘下载 Microsoft Visual C++ 15.0。
网盘链接（用XX猴，懂得都懂）：
https://pan.baidu.com/s/19F4YurwwZ5A9WF5txzMZoQ 提取码：ka7q

2.经历了痛苦的等待后（实际很开心）

直接下载安装完后，又出现了新的问题（我随便拿别人的，我的python版本是3.8）：

(base) C:Usersclaire>pip install pyscipopt
Collecting pyscipopt
  Using cached https://files.pythonhosted.org/packages/a7/47/e3d5fcc37138c0eb9695d7c26e22b999c1274b06606db183c2aa36f98e5a/PySCIPOpt-2.2.0.tar.gz
Building wheels for collected packages: pyscipopt
  Building wheel for pyscipopt (setup.py) ... error
  ERROR: Complete output from command 'C:UsersclaireAnaconda3python.exe' -u -c 'import setuptools, tokenize;__file__='"'"'C:\Users\claire\AppData\Local\Temp\pip-install-zja79xrm\pyscipopt\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'rn'"'"', '"'"'n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d 'C:UsersclaireAppDataLocalTemppip-wheel-jnmor4q4' --python-tag cp37:
  ERROR: Using include path .
  Using SCIP library  at .
  running bdist_wheel
  running build
  running build_py
  creating build
  creating buildlib.win-amd64-3.7
  creating buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptMultidict.py -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipopt__init__.py -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptscip.pyx -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptscip.pxd -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptbenders.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptbenderscut.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptbranchrule.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptconshdlr.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptevent.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptexpr.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptheuristic.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptlp.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptpresol.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptpricer.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptpropagator.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptrelax.pxi -> buildlib.win-amd64-3.7pyscipopt
  copying srcpyscipoptsepa.pxi -> buildlib.win-amd64-3.7pyscipopt
  running build_ext
  building 'pyscipopt.scip' extension
  creating buildtemp.win-amd64-3.7
  creating buildtemp.win-amd64-3.7Release
  creating buildtemp.win-amd64-3.7Releasesrc
  creating buildtemp.win-amd64-3.7Releasesrcpyscipopt
  C:Program Files (x86)Microsoft Visual Studio2017EnterpriseVCToolsMSVC14.15.26726binHostX86x64cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -IC:UsersclaireAppDataLocalTemppip-install-zja79xrmpyscipoptsrc -IC:UsersclaireAnaconda3include -IC:UsersclaireAnaconda3include "-IC:Program Files (x86)Microsoft Visual Studio2017EnterpriseVCToolsMSVC14.15.26726ATLMFCinclude" "-IC:Program Files (x86)Microsoft Visual Studio2017EnterpriseVCToolsMSVC14.15.26726include" "-IC:Program Files (x86)Windows Kits10include10.0.17134.0ucrt" "-IC:Program Files (x86)Windows Kits10include10.0.17134.0shared" "-IC:Program Files (x86)Windows Kits10include10.0.17134.0um" "-IC:Program Files (x86)Windows Kits10include10.0.17134.0winrt" "-IC:Program Files (x86)Windows Kits10include10.0.17134.0cppwinrt" /Tcsrcpyscipoptscip.c /Fobuildtemp.win-amd64-3.7Releasesrcpyscipoptscip.obj
  scip.c
  srcpyscipoptscip.c(621): fatal error C1083: Cannot open include file: 'scip/scip.h': No such file or directory
  error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\VC\Tools\MSVC\14.15.26726\bin\HostX86\x64\cl.exe' failed with exit status 2
  ----------------------------------------
  ERROR: Failed building wheel for pyscipopt
  Running setup.py clean for pyscipopt
Failed to build pyscipopt
Installing collected packages: pyscipopt
  Running setup.py install for pyscipopt ... error
    ERROR: Complete output from command 'C:UsersclaireAnaconda3python.exe' -u -c 'import setuptools, tokenize;__file__='"'"'C:\Users\claire\AppData\Local\Temp\pip-install-zja79xrm\pyscipopt\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'rn'"'"', '"'"'n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:UsersclaireAppDataLocalTemppip-record-aw3wx8loinstall-record.txt' --single-version-externally-managed --compile:
    ERROR: Using include path .
    Using SCIP library  at .
    running install
    running build
    running build_py
    creating build
    creating buildlib.win-amd64-3.7
    creating buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptMultidict.py -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipopt__init__.py -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptscip.pyx -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptscip.pxd -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptbenders.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptbenderscut.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptbranchrule.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptconshdlr.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptevent.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptexpr.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptheuristic.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptlp.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptpresol.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptpricer.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptpropagator.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptrelax.pxi -> buildlib.win-amd64-3.7pyscipopt
    copying srcpyscipoptsepa.pxi -> buildlib.win-amd64-3.7pyscipopt
    running build_ext
    building 'pyscipopt.scip' extension
    creating buildtemp.win-amd64-3.7
    creating buildtemp.win-amd64-3.7Release
    creating buildtemp.win-amd64-3.7Releasesrc
    creating buildtemp.win-amd64-3.7Releasesrcpyscipopt
    C:Program Files (x86)Microsoft Visual Studio2017EnterpriseVCToolsMSVC14.15.26726binHostX86x64cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -IC:UsersclaireAppDataLocalTemppip-install-zja79xrmpyscipoptsrc -IC:UsersclaireAnaconda3include -IC:UsersclaireAnaconda3include "-IC:Program Files (x86)Microsoft Visual Studio2017EnterpriseVCToolsMSVC14.15.26726ATLMFCinclude" "-IC:Program Files (x86)Microsoft Visual Studio2017EnterpriseVCToolsMSVC14.15.26726include" "-IC:Program Files (x86)Windows Kits10include10.0.17134.0ucrt" "-IC:Program Files (x86)Windows Kits10include10.0.17134.0shared" "-IC:Program Files (x86)Windows Kits10include10.0.17134.0um" "-IC:Program Files (x86)Windows Kits10include10.0.17134.0winrt" "-IC:Program Files (x86)Windows Kits10include10.0.17134.0cppwinrt" /Tcsrcpyscipoptscip.c /Fobuildtemp.win-amd64-3.7Releasesrcpyscipoptscip.obj
    scip.c
    srcpyscipoptscip.c(621): fatal error C1083: Cannot open include file: 'scip/scip.h': No such file or directory
    error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\VC\Tools\MSVC\14.15.26726\bin\HostX86\x64\cl.exe' failed with exit status 2
    ----------------------------------------
ERROR: Command "'C:UsersclaireAnaconda3python.exe' -u -c 'import setuptools, tokenize;__file__='"'"'C:\Users\claire\AppData\Local\Temp\pip-install-zja79xrm\pyscipopt\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'rn'"'"', '"'"'n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:UsersclaireAppDataLocalTemppip-record-aw3wx8loinstall-record.txt' --single-version-externally-managed --compile" failed with error code 1 in C:UsersclaireAppDataLocalTemppip-install-zja79xrmpyscipopt

其实真正的问题是：

你在C:Program FilesSCIPOptSuite-6.0.2include这个文件夹找不到scip.h文件。
这是因为你缺了SCIP优化组件，然后我就去这个网址：
https://www.scipopt.org/download.php?fname=SCIPOptSuite-6.0.2-win64-VS15.exe
下载了对应的版本。

上述链接的安装教程：

https://www.cnblogs.com/dengfaheng/p/10041488.html

按步骤安装好后其实问题还没有真正解决。

还是出现了同样的错误，那是因为prompt不能知道你到底把SCIP优化组件放在哪个地方，你要写一个命令
set SCIPOPTDIR=“C:Program Files你的SCIP优化组件安装的位置”（我是默认的）
再输入pip install pyscipopt==对应版本，因为它默认安装最新的4.x，所以出错才正常啊，所以它还是会说你在C:Program FilesSCIPOptSuite-6.0.2include这个文件夹找不到scip.h文件。

注意！

SCIP优化组件的版本	对应要下载的pyscipopt的版本
8.0	4.x
7.0	3.x

那好，由于我下的是6.02版本，那么对应的就要下2.x版本的pyscipopt。
最后就大功告成了。

走过的弯路

找了要去解决这个error: command 'C:Program Files (x86)Microsoft Visual Studio2017EnterpriseVCToolsMSVC14.15.26726binHostX86x64cl.exe’错误的博客，可是没什么卵用。（算是抱怨吧）奶奶的，有那么几篇博文误人子弟，胡说八道，有的说去下SCIP优化组件的tgz解压后放到我的lib文件夹，还有的是要我更新python安装程序的version，现在慢慢的一堆黄黄难看的warning。

如何正确pip install pyscipopt

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