The CentOS7 environment builds python3 and the way it coexists with python2 implementations

This article gives an example of how CentOS7 builds python3 and coexists with python2 implementations. To share for your reference, the details are as follows:

Notes:

1. Non-root account plus sudo

2. centos7 comes with Python 2.7.5, which cannot be uninstalled. Many system-level software rely on it

Install dependencies

# yum -y groupinstall "Development tools"
# yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

Download python3 and mine is ES20en-3.4.2.tgz

# wget https://www.python.org/ftp/python/3.4.2/Python-3.4.2.tgz
# mkdir /usr/local/python3
# tar -zxvf Python-3.4.2.tgz
# cd Python-3.4.2
# ./configure --prefix=/usr/local/python3
# make && make install
# ln -s /usr/local/python3/bin/python3 /usr/bin/python3

test

Check the version

# python3
Python 3.4.2 (default, Jul 19 2016, 03:47:32)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-4)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>

The test code

Create a new python script in the current directory, hello.py

Content:

#!/usr/bin/python3
#  The first 1 A comment 
print ("Hello, Python3!")
 perform 
# python3 hello.py
Hello, Python3!

Hopefully this article has helped you with CentOS server maintenance.