CentOS配置python操作
<p>centos7.3 安装python</p><p><br>查看当前python情况<br># cd /<br># cd /usr/bin<br># ls python*<br>pythonpython2python2.7 <br># ls -alpython*</p>
<p>修改软连接<br># mv python python.bak</p>
<p>开始做下载准备<br># mkdir /usr/local/python3 <br># cd /usr/local/python3</p>
<p>开始下载<br># wget https://www.python.org/ftp/python/3.6.3/Python-3.6.3.tgz</p>
<p>#解压命令<br># tar -xvf Python-3.6.3.tgz </p>
<p>#解压完成后，查看目录下文件<br># ll<br>total 22148<br>drwxr-xr-x. 17501501 4096 Oct 21 12:22 Python-3.6.3<br>-rw-r--r--.1 root root 22673115 Oct3 15:47 Python-3.6.3.tgz</p>
<p>指定python的安装目录<br># cd Python-3.6.3/<br># ./configure --prefix=/usr/local/python3Dir</p>
<p>编译文件<br># make<br># make install</p>
<p>创建一个python3的软链接<br># cd /usr/bin<br># ln -s /usr/local/python3Dir/bin/python3 /usr/bin/python</p>
<p>修改yum，将#!/usr/bin/python改成#!/usr/bin/python2.7 <br># vi /usr/bin/yum<br># vi /usr/libexec/urlgrabber-ext-down<br># vi /usr/bin/yum-config-manager</p>
<p>检查下链接情况<br># ll -a python*<br># python -V<br># python3<br># python2<br># python</p>
<p><br>#######################################<br>准备安装pip，下载需要的环境<br># yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel<br># yum install -y epel-release</p>
<p>开始安装pip3<br># yum install python36-pip</p>
<p>检查pip3是否成功<br># pip3 -V</p>
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<p>==================================================================<br>3.7版本需要一个新的包libffi-devel，安装此包之后再次进行编译安装即可。</p>
<p>#yum install libffi-devel -y<br>#make install<br>若在安装前移除了/usr/bin下python的文件链接依赖，此时yum无法正常使用，需要自己下载相关软件包安装，为节省读者时间，放上链接</p>
<p>#wget http://mirror.centos.org/centos/7/os/x86_64/Packages/libffi-devel-3.0.13-18.el7.x86_64.rpm<br>#rpm -ivh libffi-devel-3.0.13-18.el7.x86_64.rpm<br>安装完成后重新进行make install，结束后再次配置相关文件的软连接即可。</p>
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<p><br>====================================================================<br>加入不记得位置，卸载python3方式<br> rpm -qa|grep python3|xargs rpm -ev --allmatches --nodeps 卸载pyhton3<br> whereis python3 |xargs rm -frv 删除所有残余文件<br> 成功卸载！<br> whereis python 查看现有安装的python</p>
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来源：https://www.cnblogs.com/7134g/p/11510407.html
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