Centos6.X从Python2.6、pip2.6升级到python2.7和pip2.7

待我称王封你为后i 2022-06-01 01:29 106阅读 0赞

【解决步骤】  
下载python2.7的软件包，解压、编译、安装，  
再修改系统默认的符号链接(软链接)，指向2.7版本。  
过程如下 ——  
$ wget http://www.python.org/ftp/python/2.7.8/Python-2.7.8.tar.xz  
$ xz -d Python-2.7.8.tar.xz  
$ tar -xvf Python-2.7.8.tar  
再将系统默认的python命令手动修改，把它指向python2.7 即可，操作如下 ——

$ cd Python-2.7.8

$ ./configure

$ make && make install

$ pwd  
/usr/bin  
$ mv /usr/bin/python /usr/bin/python\_original2.6  
$ ln -s /usr/local/bin/python2.7 /usr/bin/python \# 把系统默认的 python 指向我们的 python2.7  
\[root@tony-host-2 bin\]\# ll | grep python  
lrwxrwxrwx. 1 root root 15 Jul 19 14:38 ambari-python-wrap -> /usr/bin/python  
lrwxrwxrwx. 1 root root 24 Jan 16 19:23 python \-> /usr/local/bin/python2.7 \# 实际指向python2.7  
lrwxrwxrwx. 1 root root 6 Jul 19 14:35 python2 -> python  
\-rwxr-xr-x. 2 root root 4864 Aug 18 2016 python2.6  
\-rwxr-xr-x. 1 root root 1418 Aug 18 2016 python2.6-config  
lrwxrwxrwx. 1 root root 16 Jul 19 14:37 python-config -> python2.6-config  
\[root@tony-host-2 bin\]\# cd ~  
\[root@tony-host-2 ~\]\# python -V  
Python 2.7.8  
\[升级完成\]

还有个问题，pip版本使用的仍然是系统默认的python2.6

$ whereis pip  
pip: /usr/bin/pip2.6 /usr/bin/pip  
  
解决办法 ——  
首先要明白的是，如果pip是基于python 2.7的，那么我们的系统应该已经装了一个可执行文件"pip2.7"（此文件可能在我们的$PATH环境变量里面能看到）。  
找到pip2.7在哪：在linux命令行查看 which pip2.7 此命令应该会输出'/usr/local/bin/pip2.7'  
\[root@tony-host-2 hbase\]\# which pip2.7  
/usr/bin/which: no pip2.7 in (/usr/java/oracle-jdk/bin:/usr/java/oracle-jdk/bin:/usr/java/oracle-jdk/bin:/usr/java/oracle-jdk/bin:/usr/lib64/qt-3.3/bin:/usr/lib64/ccache:/usr/java/oracle-jdk/bin:/usr/java/oracle-jdk/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/java/oracle-jdk/bin:/usr/java/oracle-jdk/bin:/usr/local/gradle-2.7/bin:/usr/local/git/bin:/usr/local/maven/bin:/root/bin)  
既然没有输出pip2.7的路径，那么原因就是没安转pip2.7，安装它就好了。安装过程 ——  
找一个目录执行  
$ wget https://bootstrap.pypa.io/get-pip.py  
$ sudo python2.7 get-pip.py \# 安装好以后，查看$ which pip2.7 输出应该是 /usr/local/bin/pip2.7 再查看pip版本  
$ pip --version  
pip 9.0.1 from /usr/local/lib/python2.7/site-packages (python 2.7)  
\[完成\]

【附】安装Python第三方包 mysql-connector 用于连接MYSQL：[http://www.runoob.com/python3/python-mysql-connector.html][http_www.runoob.com_python3_python-mysql-connector.html]

[http_www.runoob.com_python3_python-mysql-connector.html]: http://www.runoob.com/python3/python-mysql-connector.html