linux下python的安装

    下载python3，进行编译安装，运行django程序
        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/3.6.7/Python-3.6.7.tar.xz
            
            xz -d Python-3.6.7.tar.xz
            tar -xf Python-3.6.7.tar        #解压缩，生成一个python源码文件夹
        
        3.进入python源码文件夹
            cd Python-3.6.7 
        4.进行编译安装，编译三部曲
            1.第一曲
                ./configure --prefix=/opt/python36/
                        --prefix  参数解释：指定python36安装的位置 
            2.第二曲
                make 
            3.第三曲 ，此时就开始安装python3软件
                make install 
                
            
        5.进入python36安装目录 ，检查bin目录
        
        
        6.配置python3的环境变量  PATH 
            1.取出当前的path变量
            echo $PATH
            2.填写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.讲环境变量，写入到全局配置文件/etc/profile 
            vim  /etc/profile 
            
            4.写入如下代码，在最底行写入如下配置
            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
            1.安装django模块
            pip3 install -i  https://pypi.douban.com/simple django==1.11.14
        
            2.升级pip
            pip3 install --upgrade pip
            
            3.通过命令创建django项目
             3.1 cd /opt
                                                 3.2 django-admin startproject crm
                                                 3.3 cd /crm
                                                 3.4关闭防火墙 iptables -F
                                                 3.5 cd /crm
                                                         vim crm/settings         ALLOW_HOSTS=['*']    DEBUG=FALSE
                                                 3.6 django-admin startapp app01
                                                 3.7 vim crm/settings.py       导入app01
                                                3.8 vim crm/urls.py         写入路径
                                                3.9 vim app01/views.py   写入函数
                                             启动app01  cd /crm
                                               python3 manage.py runserver 0.0.0.0:8000

 

来源：https://www.cnblogs.com/l1222514/p/11406723.html