Tutorial Link:
- Virtual Environments and Packages https://docs.python.org/3/tutorial/venv.html#tut-venv
Installing packages using pip and virtual environments https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/
Scrapy 2.4 documentation https://docs.scrapy.org/en/latest/
Scrapy 2.4 Installation guide https://docs.scrapy.org/en/latest/intro/install.html#intro-using-virtualenv
Scrapy Tutorial https://docs.scrapy.org/en/latest/intro/tutorial.html
py3.7安装Scrapy及安装时的 Running setup.py install for Twisted ... error 和安装后的 Unhandled error in Deferred: https://my.oschina.net/u/4301494/blog/3455630
正确操作：手动下载Twisted包并会用pip命令安装 下载地址：http://www.lfd.uci.edu/~gohlke/pythonlibs/#twisted Unofficial Windows Binaries for Python Extension Packages
pip安装Twisted报ERROR: Twisted-20.3.0-cp38-cp38-win_amd64.whl is not a supported wheel on this platform https://blog.csdn.net/weixin_39106791/article/details/107510182