windows安装scrapy

1.安装Twisted

直接pip install Twisted

然后报错

    error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": http://landinghub.visualstudio.com/visual-cpp-build-tools

    ----------------------------------------
Command "c:\users\zb\appdata\local\programs\python\python36-32\python.exe -u -c "import setuptools, 
tokenize;__file__='C:\\Users\\zb\\AppData\\Local\\Temp\\pip-build-10ew2ma_\\Twisted\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))"
 install --record C:\Users\zb\AppData\Local\Temp\pip-85cixft1-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\zb\AppData\Local\Temp\pip-build-10ew2ma_\Twisted\
You are using pip version 9.0.1, however version 10.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

最后一句提醒让升级pip，然后运行 python -m pip install --upgrade pip 运行

这时候我们成功升级了pip了。然后重新安装pip install twisted运行之后看到出现如下错误

    building 'twisted.test.raiser' extension
    error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": http://landinghub.visualstudio.com/visual-cpp-build-tools

字面意思看需要安装Microsoft Visual C++ 14.0 ，但是这个东西安装起来很麻烦，而且安装上了也不一定准确，这个时候呢，我们一般就考虑第三方的python模块安装包
http://www.lfd.uci.edu/~gohlke/pythonlibs/

然后搜索twisted，下载对应的版本，下图cp36就是python3.6x版本用的，win32是指的python的位数，cmd输入python查看python的版本，这里我就下载下面蓝色x