Linux
pip3 install scrapy
windows
按照顺序进行如下操作
a .pip3 install wheel
b. 下载twisted https://www.lfd.uci.edu/~gohlke/pythonlibs/#twisted
c.进入下载目录,执行pip3 install Twisted-19.7.0-cp37-cp37m-win_amd64.whl
下载python对应的版本
d.pip install pywin32
e.pip3 install scrapy
scrapy升级到最新版本
pip install --upgrade pip
pip uninstall scrapy
pip install scrapy