centos7下python3的安装

#yum 
yum groupinstall "Development tools"

yum install gcc wget openssl-static zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

# 下载python

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

# 解压

tar -xvf Python-3.6.1.tar.xz

# 进入Python-3.6.1目录

cd Python-3.6.1/

# 安装编译

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

make 

make install

# 建立软连

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

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

# 查看版本

python3 -m pip -V

pip3 -V

# 切换源

mkdir ~/.pip

vim ~/.pip/pip.conf 

[global]

index-url=http://mirrors.aliyun.com/pypi/simple/

[install]

trusted-host=mirrors.aliyun.com

# 安装依赖

pip3 install -r requirements.txt

# 快速生成requirement.txt的安装文件

pip3 freeze > requirements.txt