Recommended way to install pip(3) on centos7

Question

I am interrested in knowing the recommended way to install pip3 for python3.6 (as of today, may 2018) on current version of centos7 (7.5.1804) and the accepted answer of How

Answer 1

I got this error when I tried to install python36 over the built-in centos7 python 2.7.5 version:

Transaction check error:
  file /etc/rpm/macros.python from install of python-rpm-macros-3-32.el7.noarch conflicts with file from package python-devel-2.7.5-80.el7_6.x86_64

And I fixed it with these:

yum install python36
yum update python-devel
yum install python36-devel
easy_install-3.6 pip