文章目录

前言一、安装SCIP二、安装PySCIPOpt及中间的坑

前言

Linux下安装SCIP+PySCIPOpt时常会出现如下的报错，本文记录一下对这个问题的解决。

fatalerrorC1083:Cannotopenincludefile:'scip/scip.h':Nosuchfileordirectory

在Windows平台的下载步骤可以参考这篇博文，十分详细。WIndows平台的安装步骤：https://www.cnblogs.com/dengfaheng/p/10041488.html

一、安装SCIP

建议在官网下载源代码官网地址是https://www.scipopt.org/index.php#download建议下载scipoptsuite.tgz

之后的安装命令为

cdscipoptsuite-4.0.0

mkdirbuild

cdbuild

cmake..

make

之后配置一下环境

vim~/.bashrc

exportPATH=$PATH:~/software/scip/scipoptsuite-4.0.0/build/bin/

source~/.bashrc

之后可以在bash中输入scip进行测试

二、安装PySCIPOpt及中间的坑

正常来说下面直接

pipinstallPySCIPOpt

或者下载源码编译安装就行了，但直接这样的话就会遇到这个bug

fatalerrorC1083:Cannotopenincludefile:'scip/scip.h':Nosuchfileordirectory

使用cd命令进入文件夹~/software/scip/scipoptsuite-4.0.0/build/bin/，发现确实没有include文件夹，更不用说里面的scip.h头文件了

那么include文件夹在哪儿呢？

实际上就在刚刚下载的scipoptsuite.tgz下面将其解压之后，拷贝到~/software/scip/scipoptsuite-4.0.0/build/bin/之后就大功告成了！

在下载源代码进行安装时，在

pythonsetup.pyinstall

之前，需要指定路径，即

exportSCIPOPTDIR=~/software/scip/scipoptsuite-4.0.0/build/bin

1.报错：ReadTimeoutError: HTTPSConnectionPool(host=’pypi.python.org’, port=443): Read timed out.

Downloading xgboost-0.6a2.tar.gz (1.2MB)

    48% |███████████████▋                | 583kB 47kB/s eta 0:00:13Exception:

Traceback (most recent call last):

  File "c:\python27\lib\site-packages\pip\basecommand.py", line 215, in main

    status = self.run(options, args)

  File "c:\python27\lib\site-packages\pip\commands\install.py", line 335, in run

    wb.build(autobuilding=True)

  File "c:\python27\lib\site-packages\pip\wheel.py", line 749, in build

    self.requirement_set.prepare_files(self.finder)

  File "c:\python27\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files

    ignore_dependencies=self.ignore_dependencies))

  File "c:\python27\lib\site-packages\pip\req\req_set.py", line 620, in _prepare_file

    session=self.session, hashes=hashes)

  File "c:\python27\lib\site-packages\pip\download.py", line 821, in unpack_url

    hashes=hashes

  File "c:\python27\lib\site-packages\pip\download.py", line 659, in unpack_http_url

    hashes)

  File "c:\python27\lib\site-packages\pip\download.py", line 882, in _download_http_url

    _download_url(resp, link, content_file, hashes)

  File "c:\python27\lib\site-packages\pip\download.py", line 603, in _download_url

    hashes.check_against_chunks(downloaded_chunks)

  File "c:\python27\lib\site-packages\pip\utils\hashes.py", line 46, in check_against_chunks

    for chunk in chunks:

  File "c:\python27\lib\site-packages\pip\download.py", line 571, in written_chunks

    for chunk in chunks:

  File "c:\python27\lib\site-packages\pip\utils\ui.py", line 139, in iter

    for x in it:

  File "c:\python27\lib\site-packages\pip\download.py", line 560, in resp_read

    decode_content=False):

  File "c:\python27\lib\site-packages\pip\_vendor\requests\packages\urllib3\response.py", line 357, in stream

    data = self.read(amt=amt, decode_content=decode_content)

  File "c:\python27\lib\site-packages\pip\_vendor\requests\packages\urllib3\response.py", line 324, in read

    flush_decoder = True

  File "c:\python27\lib\contextlib.py", line 35, in __exit__

    self.gen.throw(type, value, traceback)

  File "c:\python27\lib\site-packages\pip\_vendor\requests\packages\urllib3\response.py", line 246, in _error_catcher

    raise ReadTimeoutError(self._pool, None, 'Read timed out.')

ReadTimeoutError: HTTPSConnectionPool(host='pypi.python.org', port=443): Read timed out.

错误原因：连不上pip的源，下载依赖包失败

解决1(推荐)：在pip安装所在文件夹路径下，创造python文件(.py)

import os  

ini="""[global] 

index-url = https://pypi.doubanio.com/simple/ 

[install] 

trusted-host=pypi.doubanio.com 

"""  

pippath=os.environ["USERPROFILE"]+"\\pip\\"  

if not os.path.exists(pippath):  

    os.mkdir(pippath)  

with open(pippath+"pip.ini","w+") as f:  

    f.write(ini)  

在cmd上运行这个.py文件即可

之后再用pip install安装指令下载速度会非常快

解决2：修改加大超时时间

pip --default-timeout=100 install -U pip

1

如下指令安装

pip --default-timeout=100 install -U scrapy(库名）

1

解决3：到https://pypi.python.org/simple/pip/下载相对应的.whl文件

下载完之后，在用pip安装：

pip install (path)/pip-8.1.2-py2.py3-none-any.whl

更换下载源:

豆瓣源 : http://pypi.douban.com/simple/

清华源: https://pypi.tuna.tsinghua.edu.cn/simple

使用方法 : pip install -i https://pypi.tuna.tsinghua.edu.cn/simple pyscipopt

python通过pyscipopt包来调用安装好的SCIPOptSuite，所以还需要安装pyscipopt，直接pip install pyscipopt==版本号 安装pyscipopt包，建议直接指定版本号，默认的有时候会出错。

1、如果出现报错，注意看是什么，如果缺少依赖则安装相应依赖即可

2、如果是版本问题则要注意pyscipopt的版本是否和SCIPOptSuite的版本匹配，匹配关系见https://github.com/SCIP-Interfaces/PySCIPOpt/blob/master/INSTALL.md

另外一种特殊情况，如果没有指定版本号，即直接pip install pyscipopt默认的PySCIPOpt包版本不对，就像这样子，所以最好指定版本号。