Linux安装python3

1.解决python编译安装所需的软件依赖

yum install gcc patch libffi-devel python-devel  zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel -y

2.下载python3源码包

wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tar.xz
xz -d Python-3.6.5.tar.xz
tar -xvf Python-3.6.5.tar  # 解压缩，生成一个python源码文件夹

3.进入python3源码文件夹

cd Python-3.6.5/

4.进行编译安装

# 第一步
./configure  --prefix=/opt/python36/
# 第二步
make
#第三步
make install    # make && make install 第二、第三步并作一步执行

5.进入python36源码目录，检查bin目录

6.配置python3的环境变量 

# 1.取出当前的path变量
echo  $PATH
# 2.取出python3的bin目录到PATH中
PATH=” /opt/python36/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin”
# 3.将环境变量写入到全局配置文件/etc/profile
vim  /etc/profile
# 4.写入以下代码，在最底行配置
PATH=” /opt/python36/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin”
# 5.读取配置文件，加载变量生效
source  /etc/profile

7.安装django，运行django

 pip3 install -i https://pypi.douban.com/simple django    # 安装的是默认版本的django
  
  187  pip3 install -i https://pypi.douban.com/simple django==1.11.9    # 安装指定版本
  188  pip3 install --upgrade pip
  189  pip3 list
  190  cd /opt
  191  django-admin startproject crm
  192  ls
  193  cd crm
  194  ls
  195  python3 manage.py runserver
  
  
  198  iptables -L
  199  iptables -F   # 关闭防火墙
  # python3 manage.py runserver 0.0.0.0:8000  
  202  python3 manage.py runserver 192.168.40.145:8000