CentOS 7 under Python environment settings-1

Installing Python 3

CentOS 7 comes with Python 2.7, so if you want to use Python 3, you'll need to reinstall Python 3

1, download the Python3.5 package

wget HTTPS://WWW.PYTHON.ORG/FTP/PYTHON/3.5.1/PYTHON-3.5.1.TAR.XZ

2. Unpack the TAR Package

TAR-ZXVF PYTHON-3.5.1.TAR.XZ

3. Move Python below the/usr/local

MV Python-3.5.1/usr/local

4. Enter the Python directory

Cd/usr/local/python-3.5.1/

5. Installing the GCC software suite

Yum Install GCC

6. Configuration

./configure

7. Compiling

Make

8, compile, install

Make install

9. Delete the old soft connection, create a new soft connection to the latest Python

Rm-rf/usr/bin/python

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

10. Because Yum uses python2, it may not continue to work properly after being replaced with Python3 python2.7.5

Modify the Yum config file (sudo vi/usr/bin/yum) to change the #!/usr/bin/python of the file header to #!/usr/bin/python2.7 save and exit.

Install python pip

Because of distributions like CentOS, sometimes the source updates are compared, so when you use Yum to search Python-pip, you will say that the package is not found. Therefore, to be able to install these packages, you need to install the extension source Epel

EPEL (Http://fedoraproject.org/wik/EPEL) is a project built by the Fedora community to deliver high-quality software packages for Rhel and derivative distributions such as CentOS, Scientific Linux, etc.

First install the Epel extension source

sudo yum-y install Epel-release

Then install Python-pip

Suo yum-y Install Python-pip

Clear the cache after the installation is complete

sudo yum clean all

Add the PYTHONPATH environment variable in the shell to increase the search path for Python (/home/vamei/mylib)

Export pythonpath= $PYTHONPATH:/home/vamei/mylib

CentOS 7 under Python environment settings-1