CentOS 7系统自带了python2,不过可以不用2版本,直接使用python3运行python脚本就可以,但是千万别去懂系统自带的python2,因为有程序依赖目前的python2环境,比如yum!!!!!动了yum就无法运行了,其他有的程序也可能会受影响。明白了上面的,然后就来安装Python3.6:
安装步骤:
1. 安装依赖环境
# yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel
2.下载Python3
https://www.python.org/downloads/
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# wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tgz
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3.安装python3
包安装在/usr/local/Python3(具体安装位置看个人喜好)
创建目录:
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# mkdir -p /usr/local/Python3
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解压下载好的Python-3.6.5.tgz包(具体包名因你下载的Python具体版本,我下载的是Python3.6.5这里就以Python-3.6.5.tgz为例)
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# tar -zxvf Python-3.6.5.tgz
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4.进入解压后的目录,编译安装。(如果编译安装过程有报错提示看我的另一个随笔写的解决办法http://www.cnblogs.com/shwee/p/9013851.html)
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# cd Python-3.6.5
# ./configure --prefix=/usr/local/Python3
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然后:make
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# make
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接着:make install
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make install 或者 make && make install
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5.安装好了,建立python3的软链
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# ln -s /usr/local/Python3/bin/python3 /usr/bin/python3
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6.并将/usr/local/Python3/bin加入PATH
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# vim ~/.bash_profile
# .bash_profile
# Get the aliases and functions
if
[
-
f ~
/
.bashrc ]; then
. ~
/
.bashrc
fi
# User specific environment and startup programs
PATH
=
$PATH:$HOME
/
bin
:
/
usr
/
local
/P
ython3
/
bin
export PATH
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按ESC,输入:wq,按回车保存退出编辑。
修改完记得执行行下面的命令,让上一步的修改生效:
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# source ~/.bash_profile
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检查Python3及pip3是否正常可用:
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3
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# python3 -V
Python
3.6
.
1
# pip3 -V
pip
9.0
.
1
from
/
usr
/
local
/
python3
/
lib
/
python3.
6
/
site
-
packages (python
3.6
)
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7.pip3如果查看不了,再创建一下pip3的软链接
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# ln -s /usr/local/Python3/bin/pip3 /usr/bin/pip3
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