Installing from RPM is generally better, because:

• you can install and uninstall (properly) python3.
• the installation time is way faster. If you work in a cloud environment with multiple VMs, compiling python3 on each VMs is not acceptable.

Solution 1: Red Hat & EPEL repositories

Red Hat has added through the EPEL repository:

• Python 3.4 for CentOS 6
• Python 3.6 for CentOS 7

[EPEL] How to install Python 3.4 on CentOS 6

sudo yum install -y epel-release
sudo yum install -y python34

# Install pip3
sudo yum install -y python34-setuptools  # install easy_install-3.4
sudo easy_install-3.4 pip

You can create your virtualenv using pyvenv:

pyvenv /tmp/foo

[EPEL] How to install Python 3.6 on CentOS 7

With CentOS7, pip3.6 is provided as a package :)

sudo yum install -y epel-release
sudo yum install -y python36 python36-pip

You can create your virtualenv using pyvenv:

python3.6 -m venv /tmp/foo

If you use the pyvenv script, you'll get a WARNING:

$ pyvenv-3.6 /tmp/foo
WARNING: the pyenv script is deprecated in favour of `python3.6 -m venv`

Solution 2: IUS Community repositories

The IUS Community provides some up-to-date packages for RHEL & CentOS. The guys behind are from Rackspace, so I think that they are quite trustworthy...

https://ius.io/

Check the right repo for you here:

https://ius.io/setup

[IUS] How to install Python 3.6 on CentOS 6

sudo yum install -y https://repo.ius.io/ius-release-el6.rpm
sudo yum install -y python36u python36u-pip

You can create your virtualenv using pyvenv:

python3.6 -m venv /tmp/foo

[IUS] How to install Python 3.6 on CentOS 7

sudo yum install -y https://repo.ius.io/ius-release-el7.rpm
sudo yum install -y python36u python36u-pip

You can create your virtualenv using pyvenv:

python3.6 -m venv /tmp/foo

All versions of CentOS come with python pre-installed. Version 5 has python 2.4, 6 has 2.6, and 7 has 2.7. If you need python 2.7 on an old version of CentOS, you can use the IUS repos.

To use the repo, you need to install the release RPM for your version of CentOS. For CentOS 6:

rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
rpm -Uvh https://dl.iuscommunity.org/pub/ius/stable/CentOS/6/x86_64/ius-release-1.0-14.ius.centos6.noarch.rpm

Once the repo is setup, you can use yum to install the alternate versions of python:

yum install python27 python34

Note that this does not change the default version of python. It is an alternate installation, so you need to specify python27 or python34 to use them.

You should have taken the default available python3, that is the python3.6 package in centos7 that would have been easier to setup rather than compile an unsupported version. Suggest you install the supported python3 package in centos

Try doing yum install python36 from repository

sudo yum install -y https://repo.ius.io/ius-release-el7.rpm

Update yum package

 sudo yum update

Install python36 along with pip

sudo yum install -y python36u python36u-libs python36u-devel python36u-pip

Below steps are for python3.7, suggest avoiding unsupported packages. Alternate Steps for pip setup for Centos You need to install pip for python3.7 series Step 1: First install the EPEL Repository

sudo yum install epel-release

Step 2: Installing pip

python37 -m pip

Step 3: Verify if pip was installed properly pip --version

If the command not found error shows up, try

python37 -m ensurepip