Install Python 3 on CentOS 7

Install python3

--Check the current version

$ python --version
Python 2.7.5

--Adding yum repository to CentOS7

yum install -y

--Search for packages

yum search python36
=============================================== N/S matched: python36 ===============================================
python36-cairo-devel.x86_64 : Libraries and headers for python36-cairo
python36-greenlet-devel.x86_64 : C development headers for python36-greenlet
python36-psycopg2-tests.x86_64 : Test suite for python36-psycopg2
boost-python36.x86_64 : Shared object symbolic links for Boost.Python 3
boost-python36-devel.x86_64 : Shared object symbolic links for Boost.Python 3
boost-python36-static.x86_64 : The Python3 Boost C++ static development libraries
libpeas-loader-python36.x86_64 : Python 36 loader for libpeas
python36.x86_64 : Interpreter of the Python programming language
python36-Cython.x86_64 : A language for writing Python 3.6 extension modules
python36-GitPython.noarch : Python3 Git Library
python36-HepMC3.x86_64 : HepMC3 Python 3 bindings
python36-HepMC3-rootIO.x86_64 : HepMC3 ROOT I/O module Python 3 bindings
python36-HepMC3-search.x86_64 : HepMC3 search module Python 3 bindings
python36-PyMySQL.noarch : Pure-Python MySQL client library
python36-PyYAML.x86_64 : YAML parser and emitter for Python 3.6
python36-SecretStorage.noarch : Python 3.x module for secure storing of passwords and secrets
python36-abimap.noarch : A helper for library maintainers to use symbol versioning
python36-aiosmtpd.noarch : Asyncio-based SMTP server

Various things came out, but install the necessary packages

--Package installation

yum install python36u python36u-libs python36u-devel python36u-pip

--Version confirmation

$ python --version
Python 2.7.5

$ pip --version
pip 20.2.2 from /usr/lib/python2.7/site-packages/pip (python 2.7)

$ python3.6  --version
Python 3.6.8

$ pip3 --version
pip 20.2.2 from /usr/local/lib/python3.6/site-packages/pip (python 3.6)

python3.6 is included.

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