pip尝试从源代码构建软件包.因此，您将需要库和VS2008编译器的开发标头，而这些标头的设置都非常麻烦.

pip tries to build packages from source. So you'll need development headers for libraries and VS2008 compiler, all of which is rather painful to set up.

从此处下载失败软件包的预编译二进制文件更加容易: http://www.lfd.uci.edu/~gohlke/pythonlibs/

It's easier to download prebuilt binaries for failed packages from here: http://www.lfd.uci.edu/~gohlke/pythonlibs/

然后尝试重新安装scrapy.