Install pip3/pip in Centos

1. python2
2. Installation source

yum -y install epel-release

Install pip

yum install python-pip

1. Upgrade the installed pip

 pip install --upgrade pip

At this point, the pip installation is completed, that is, there is pip in the /usr/bin directory, but note that it is under python2.

1. The installation of pip3 in
2. python3 comes with pip3, so you only need to add the soft link of pip3.

1. There is pip3 in the /usr/bin directory of the previously installed python3 (create a soft link)

ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

At this point, both pip and pip3 are available~~