In installing scrapy, pip install scrapy was used.
The front end of the installation process is smooth, but twisted needs to be installed in the automatic installation process later, and the error prompts
error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": http://landinghub.visualstudio.com/visual-cpp-build-tools
So without thinking, I foolishly followed the prompts to download. As a result, the nightmare began, prompting downloads all the way, and downloading continuously. Terminate decisively. This is the rhythm that let me download the vs development environment.
Go to the pip website and find that twisted only has python2.7 version. There is no 3.x.
I found a lot of online information and found that it is only necessary to compile the twisted package with vc according to the environment of my computer. You can also download the compiled package directly.
found such a website
https://www.lfd.uci.edu/~gohlke/pythonlibs/
The site offers a lot of
Unofficial Windows Binaries for Python Extension Packages
The conscience of the industry. Many thanks!
successfully downloaded
Twisted-17.9.0-cp36-cp36m-win_amd64.whl
Next pip install Twisted-17.9.0-cp36-cp36m-win_amd64.whl
smoothly
Next pip install scrapy
smoothly