The use of scrapy3 in the coexistence of python2 and python3

Because PYTHON2 and PYTHON3 are installed, the previous SCRAPY can be used under PYTHON2, but it fails to run under 3, and the association is still 2. When running PYTHON3, use the full path:
execute the scrapy command (assuming you want to execute scrapy When startingproject projectname), do not type scrapy directly, but add the absolute path of scrapy,
on windows: C:\python3\Scripts\scrapy startproject projectname