Steps to install python3 under centos7

Environment set up

Prepare tools:

centos7:http://mirror.bit.edu.cn/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-1611.iso virtuslvox:https://www.virtualbox.org/wiki/Downloads subline secureCRT

1. After installing the virtual machine, add the image file and select minimal to minimize the installation

yum update# Update software 
yum -y install gcc kernel-devel kenel-headers make bzip2 #  Install dependency libraries 
reboot #  restart 

2. Mount the execution script

mount /dev/cdrom /mnt #  Mount the OPTICAL drive to  mnt  directory 
cd /mnt #  Into the mnt directory 
sh ./VBoxLinuxAdditions.run #  Execute the script for installation 

reboot # restart 

Take snapshots so you can recover later

4. Installation of python environment (Install pyenv)

centos configuration

$ yum install readline readline-devel readline-static -y
$ yum install openssl openssl-devel openssl-static -y
$ yum install sqlite-devel -y
$ yum install bzip2-devel bzip2-libs -y
$ yum install patch vim git

Install python3. 3 / pip3

# The installation python3.3
$ sudo mkdir /usr/local/python3 #  Create installation directory 
$ wget --no-check-certificate https://www.python.org/ftp/python/3.6.0/Python-3.6.0.tgz # Download the source file. Note: wget To obtain https Add: --no-check-certificate
$ tar -xzvf Python-3.6.0.tgz #  Unzip the package 
$ cd Python-3.6.0 #  Go to the unzip directory 
# Compile the installation 
$ sudo ./configure --prefix=/usr/local/python3 #  Specify the directory to create 
$ sudo make
$ sudo make install
# configuration 2 Multiple versions coexist 
$ sudo ln -s /usr/local/python3/bin/python3 /usr/bin/python3 # create  python3  The soft link so that can be passed  python  Command to use  Python 2 . python3  To use the  Python 3 . 
# Change the default to  Python 3
$ sudo mv python python.bak 
$ sudo ln -s /usr/local/python3/bin/python3 /usr/bin/python # create  python3  The soft links 
$ sudo vi /usr/bin/yum # because  yum  use  Python 2 , so replace it with  Python 3  After may not work properly, so modify  yum  Configuration file. Will be the first 1 Line specifies the  python  Version instead  python2.7 ( #!/usr/bin/python  Instead of  #!/usr/bin/python2.7 ) 

# The source code to install  pip
$ wget --no-check-certificate https://github.com/pypa/pip/archive/9.0.1.tar.gz#  Download the source code 
$ tar -zvxf 9.0.1 -C pip-9.0.1  #  Unzip the files 
$ cd pip-9.0.1
$ python3 setup.py install#  use  Python 3  The installation 
$ sudo ln -s /usr/local/python3/bin/pip /usr/bin/pip3 # Create links 
$ pip install --upgrade pip #  upgrade  pip

Install setuptools

tar -xvf setuptools-1.4.2.tar.gz
cd setuptools-1.4.2
python setup.py install