Twisted-18.4.0-cp36-cp36m-win_amd64.whl1.pip安装scrapy报错：building'twisted.test.raiser'extensionerror:MicrosoftVisualC++14.0isrequired.Getitwith"MicrosoftVisualC++BuildTools":http://landinghub.visualstudio.com/visual-cpp-build-tools解决方法：下载对应平台版本的whl包直接安装，我的就是Python3.6（64bit）的，所以安装Twisted