linux安装python2和python3，

一、首先查看系统自带的python

默认系统安装的是python2.7

二、这里我们需要装python3
1、首先安装python环境需要的安装包
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make -y
2、开始编译安装python3
我这边直接从猿课的软件库下载的python3.5的包
解压软件包

tar -zxvf Python-3.5.0.tgz
mv Python-3.5.0 python3
cd python3/
./configure
make
make install
ln -s /usr/local/src/python3/bin/python3 /usr/bin/python3

3、查看python3的版本

[root@localhost python3]# python3 -V
Python 3.5.0

三、安装ipython
1、下载软件包

wget https://pypi.python.org/packages/79/63/b671fc2bf0051739e87a7478a207bbeb45cfae3c328d38ccdd063d9e0074/ipython-6.1.0.tar.gz#md5=1e15e1ce3f3f722da6935d7ac0e51346

2、安装ipython

[root@localhost ~]# tar xf ipython-6.1.0.tar.gz
[root@localhost ~]# cd ipython-6.1.0
[root@localhost ipython-6.1.0]# pwd
/root/ipython-6.1.0
[root@localhost ipython-6.1.0]# python3 setup.py install

3、需要安装模块

pip3 install traitlets
pip3 install pygments
pip3 install pexpect
pip3 install pickleshare
pip3 install prompt_toolkit
pip install 'prompt-toolkit==1.0.15'
pip3 install simplegeneric

4、运行ipython

[root@localhost ipython-6.1.0]# ipython
Python 3.5.0 (default, Nov 15 2018, 12:01:04) 
Type 'copyright', 'credits' or 'license' for more information
IPython 6.1.0 -- An enhanced Interactive Python. Type '?' for help.

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