scrapy安装

1.pip install lxml

2.pip install pyopenssl

3.pip install pywin32

4.下载相应版本的twisted https://www.lfd.uci.edu/~gohlke/pythonlibs/#twisted

4.安装下载的twisted ：

pip install C:\Users\lichengguang\Downloads\Twisted-17.9.0-cp36-cp36m-win_amd64.whl

5.pip install scrapy