Realization of coexistence of python2 and Python3 in Centos6.5

Installation of Python under Linux

The installation steps are as follows

1 Preparing the compilation environment

Yum Groupinstall ' Development Tools '

Yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel sqlit

2 Download Python3.5 Code package

wget HTTPS://WWW.PYTHON.ORG/FTP/PYTHON/3.5.2/PYTHON-3.5.2.TAR.XZ

3 compiling

Tar jxvf python-3.5.2.tar.xz

CD Python-3.5.2

./configure--prefix=/usr/local/python3

Make && make install

4 Setting environment variables

Echo ' Export path= $PATH:/usr/local/python3/bin ' >> ~/.BASHRC

5 Setting up the directory (this is done by typing Python3 in any directory of the system to invoke the python3.5 command)

Mv/usr/bin/python/usr/local/python.bak

Rm-rf/usr/local/python2

Ln-sv/usr/local/python2.6/usr/bin/python2

Ln-sv/usr/local/python3/bin/python3.5/usr/bin/python

6 Modify the Yum script to point to the old version of Python, which avoids Yum's inability to run

Sed-i ' S$#!/usr/bin/python$#!/usr/bin/python2.6$g '/usr/bin/yum

7 Testing

The input python appears as follows

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Realization of coexistence of python2 and Python3 in Centos6.5