CentOS Upgrade Python 2.7 and install PIP, Ipython

Https://www.cnblogs.com/technologylife/p/6242115.html

CentOS system is generally installed by default Python2.6.6 version, a lot of software needs more than 2.7, through the package management tool can not install the latest version, through the source code compiled to facilitate the installation of the specified version, only need to replace the following version of the number of the version you want.

1. Installation Steps

Download source code

1	wget http://www.python.org/ftp/python/2.7.12/Python-2.7.12.tgz

Unzip the source code in the download directory

1	tar-zxvf Python-2.7.12.tgz

Enter the extracted folder

1	cdPython-2.7.12

Build a folder in/usr/local before compiling python2.7.12 (as a Python installation path to avoid overwriting old versions, old and new versions can coexist)

1	mkdir/usr/local/python2.7.12

You need to install the following dependencies before compiling, otherwise the PIP will go wrong under the installation

1	yum installopenssl openssl-devel zlib-devel gcc  sqlite-devel -y

After installing dependencies, execute the following command

1	vim ./Modules/Setup.dist

Find #zlib zlibmodule.c -I$(prefix)/include -L$(exec_prefix)/lib -lz out the comment and save it (i.e. remove the # number)

Compile the installation in the unzipped directory

12	./configure --prefix=/usr/local/python2.7.12 --with-zlibmake && make install

The old version is not overwritten at this time, then the original /usr/bin/python link is changed to another name

1	mv/usr/bin/python /usr/bin/python2.6.6

Create a new version of Python's soft link

1	ln-s /usr/local/python2.7.12/bin/python2.7 /usr/bin/python

This time at the command line input
　　python
The new version of Python will be displayed.

123	Python 2.7.12 (default, Oct 13 2016, 03:17:14)[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linux2Type “help”, “copyright”, “credits” or “license” formore information.

2. Modifying the Yum configuration file

The reason to keep the old version is because Yum relies on Python2.6 to change the Yum configuration file to specify the old Python version.

　　vim /usr/bin/yum, the first line is #!/usr/bin/python modified to#!/usr/bin/python2.6.6

3. Install the latest version of PIP

12	wget https://bootstrap.pypa.io/get-pip.pypython get-pip.py

Before the old version of the words are deleted first rm -rf /usr/bin/pip )

1	ln-s /usr/local/python2.7.12/bin/pip2.7 /usr/bin/pip

Look at the PIP version.

1

pip -V

PIP has been installed and can now be used to download and install various packages.

Installing Ipython

Installing using the Pip method

1	pip installipython

　　Installing the ReadLine expansion module

123	yum install readline-develyum install patch pip install readline

You need to add the Ipython path soft link to the/usr/bin directory

1	ln-s /usr/local/python2.7.12/bin/ipython  /usr/bin/ipython

At this point Ipython installation is complete

This article refers to the link: http://blog.fazero.me/2016/10/13/centos-update-python/

CentOS Upgrade Python 2.7 and install PIP, Ipython