linux安装Python3

1、下载Python3

wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tgz

3.6.1可更改为其他版本

2、解压tgz包

执行tar -zxvf Python-3.6.1.tgz，将文件解压到某一目录

3、python安装之前需要一些必要的模块

yum -y install zlib zlib-devel 
yum -y install bzip2 bzip2-devel 
yum -y install ncurses ncurses-devel 
yum -y install readline readline-devel 
yum -y install openssl openssl-devel 
yum -y install openssl-static 
yum -y install xz lzma xz-devel 
yum -y install sqlite sqlite-devel 
yum -y install gdbm gdbm-devel 
yum -y install tk tk-devel 
yum install gcc

4、 切换到之前解压的Python3.6.1目录下

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

 prefix：python的安装目录

5、

make
make install

6、修改软连接
    

 mv /usr/bin/python /usr/bin/python.bak  #把之前的软连接重命名进行备份.

 ln -s /usr/local/python3/bin/python3 /usr/bin/python #新建软连接指向/usr/local/python3/bin/python3

7、增加pip软连接

ln -s /usr/local/python3/bin/pip3 /usr/bin/pip