Python环境搭建遇到问题及解决方案记

$sudo apt-get install python3-pip

$pip3 install --upgrade pip

$sudo vi /usr/bin/pip3
from pip import __main__
if __name__ == '__main__':
    sys.exit(__main__._main()) 

from pip import main
if __name__ == '__main__':
    sys.exit(main())

$pip install scrapy

pyasn1-modules 0.2.2 has requirement pyasn1<0.5.0,>=0.4.1, but you'll have pyasn1 0.1.9 which is incompatible.

$ sudo pip uninstall pyasn1
$ sudo pip install scrapy