wget https://www.python.org/ftp/python/3.7.2/Python-3.7.2.tgz

tar -zxvf Python-3.7.2.tgz && cd Python-3.7.2

#编译安装

./configure --prefix=/usr/

make -j8 && make install

#此时已完成新版本的安装，但由于老版本还在系统中，所以需要将原来/usr/bin/python链接改为新的连接

#a.先修改老的连接，执行

mv /usr/bin/python /usr/bin/python2.6

#b.再建立新连接

ln -s /usr/local/bin/python3.7 /usr/bin/python

ln -s /usr/local/bin/python3.7-config /usr/bin/python-config

#查询python版本

python -V

#打开/usr/bin/yum

vim /usr/bin/yum

#将#!/usr/bin/python 修改为 #!/usr/bin/python2.6,保存退出

yum list

#yum 安装 easy_install

yum install python-setuptools gcc python-devel gcc libffi-devel python-devel openssl-devel readline-devel patch

easy_install pip

#通过ezsetup.py安装easyinstall

wget --no-check-certificate https://bootstrap.pypa.io/ez_setup.py

python ez_setup.py --insecure

#举个例子：安装模块paramiko，以下两种方法都可以

easy_install paramiko

pip install paramiko

#安装带setup.py的多文件模块包，下载后，解压，进入目录

python setup.py install

wget http://www.python.org/ftp/python/2.7.8/Python-2.7.8.tar.xz

xz -d Python-2.7.8.tar.xz && tar -xvf Python-2.7.8.tar

cd Python-2.7.8

# 运行配置 configure:

./configure --prefix=/usr/local

# 编译安装:

make && make altinstall

# 检查 Python 版本:

python2.7 -V

export PATH="/usr/local/bin:$PATH" or  ln -s /usr/local/bin/python2.7  /usr/bin/python

wget --no-check-certificate https://pypi.python.org/packages/source/s/setuptools/setuptools-1.4.2.tar.gz

tar -xvf setuptools-1.4.2.tar.gz

cd setuptools-1.4.2

python2.7 setup.py install

curl  https://bootstrap.pypa.io/get-pip.py | python2.7 -

[root@dbmasterxxx ~]# which yum

/usr/bin/yum

#修改 yum中的python

将第一行  #!/usr/bin/python  改为 #!/usr/bin/python2.6

此时yum就ok啦

ln -s /usr/bin/python3 /usr/bin/python

sudo add-apt-repository ppa:fkrull/deadsnakes

sudo apt-get update

sudo apt-get install python3.7

ln -s /usr/bin/python3.7   /usr/bin/python

sudo apt-get install python3-pip

sudo python3 -m easy_install pip

sudo pip3 install <packagename>