CentOS7 安装Python

1. 前置条件

• centos7 安装时 勾选Development Tools，如果你centos7没有选，需要更多必要库
• 必要库

# yum -y install zlib*

# yum -y install openssl-devel

2. 安装python3.6

# tar -zxvf Python-3.6.0.tgz

# cd Python-3.6.0/

# ./configure --prefix=/usr/local/python36

# make & make install

# ln -s /usr/local/python36/bin/python3.6 /usr/bin/python3

# ln -s /usr/local/python36/bin/pip3 /usr/bin/pip3

# pip3 install --upgrade pip    #升级

3. 安装pip（2.7）

# yum -y install epel-release

# yum -y install python-pip

# pip install --upgrade pip    #升级

• 查看版本

# python3 -V

Python 3.6.0

# python -V

Python 2.7.5

# pip3 -V

pip 18.1 from /usr/local/python36/lib/python3.6/site-packages/pip (python 3.6)

# pip -V

pip 18.1 from /usr/lib/python2.7/site-packages/pip (python 2.7)

4. 注意事项

1.建议软连接到python3，而不是python

python软连接指向/usr/bin/python,之后使用yum 会报错，在此用/usr/bin/python3

如果确实 想用python 而不是python3 来操作python3脚本，亲修改2处：

• /usr/bin/yum
• /usr/libexec/urlgrabber-ext-down

#!/usr/bin/python 修改为  #!/usr/bin/python2.7

2.python2.9以后自带pip

只需要链接到/usr/bin/pip3

# ln -s /usr/local/python36/bin/pip3 /usr/bin/pip3

3. configure 配置

./configure --enable-optimizations 如果不发放版本或者做优化 不用管

./configure --prefix=/usr/local/python36

新建一个独立的文件来安装python，方便