python3安装

1. 安装依赖

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel 
readline-devel tk-devel gcc make libffi-devel epel-release

#yum -y install python3-pip

2. 下载源码包

wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz
tar -xf Python-3.7.0.tgz
cd Python-3.7.0.tgz
./configure prefix=/soft/python3
make && make install

3. 添加软连接

ln -s /soft/python3/bin/python3.7 /usr/bin/python3
ln -s /soft/python3/bin/pip3.7 /usr/bin/pip3

4. 配置虚拟环境

python3 -m venv py37
source py37/bin/activate

# pip 管理包

pip3 list 
pip3 freeze
pip3 install requests==2.6.0 # 指定版本安装
pip3 search/install/uninstall soft_name
pip3 freeze > requirements.txt
pip3 install -r requirements

pip3 install --upgrade soft_name

使用国内开源镜像站点：

mkdir ~/.pip/
vim ~/.pip/pip.conf
[global]
index-url=http://pypi.douban.com/simple/
[install]
trusted-host=pypi.douban.com

安装pip

$ wget https://bootstrap.pypa.io/get-pip.py
$ python get-pip.py
$ pip -V　　#查看pip版本