python2.7是2.X的最后一个版本,同时她也加入了一部分3.X的新特性。并且具有更好的性能,修改多个BUG。所以决定升级到最新的2.7版,我的目前的版本是2.4.3
查看当前python版本
[root@jb51.cc ~]# pythonPython 2.4.3 (#1,Sep 3 2009,15:37:37) [GCC 4.1.2 20080704 (Red Hat 4.1.2-46)] on linux2Type "help","copyright","credits" or "license" for more information.>>># End www.jb51.cc
1.最新版本python下载安装下载新版本的python
[root@jb51.cc ~]# wget http://python.org/ftp/python/2.7.8/Python-2.7.8.tgz# End www.jb51.cc
解压缩 以及编译
[root@jb51.cc ~]# tar xvf Python-2.7.8.tar.bz2 [root@jb51.cc Python-2.7.8]# ./configure --prefix=/usr/local/python27[root@jb51.cc Python-2.7.8]# make[root@jb51.cc Python-2.7.8]# make install# End www.jb51.cc
最新2.7.8版本的python已经安装到了系统中,但是还没有完成
再次查看python版本,发现依然是2.4.3版本
[root@jb51.cc ~]# pythonPython 2.4.3 (#1,"credits" or "license" for more information.>>># End www.jb51.cc
2. python多版本共存解决下面我们来解决这个问题
把原来的python重命名成python_old,注意不要删除它,还有用,下面会说到
[root@jb51.cc Python-2.7.8]# mv /usr/bin/python /usr/bin/python_old# End www.jb51.cc
建立新的python的软链接
[root@jb51.cc Python-2.7.8]# ln -s /usr/local/python27/bin/python /usr/bin/# End www.jb51.cc
这时候我们再查看一下版本,发现正常啦!
[root@jb51.cc Python-2.7.8]# pythonPython 2.7.8 (default,Dec 3 2014,10:51:34) [GCC 4.1.2 20080704 (Red Hat 4.1.2-55)] on linux2Type "help","credits" or "license" for more information.>>># End www.jb51.cc
至此我们已经可以正常使用python2.7
3.解决yum的python版本问题
但是我们还有最后一个问题要解决
但是因为yum是使用的python2.4的版本,所以 还需要修改一下(前面我们重命名的python_old现在派上用场啦)
[root@jb51.cc ~]# yum There was a problem importing one of the Python modulesrequired to run yum. The error leading to this problem was:No module named yumPlease install a package which provIDes this module,orverify that the module is installed correctly.It's possible that the above module doesn't match thecurrent version of Python,which is:Python 2.7.8 (default,10:51:34) [GCC 4.1.2 20080704 (Red Hat 4.1.2-55)] on linux2If you cannot solve this problem yourself,please go to the yum faq at:http://wiki.linux.duke.edu/YumFaq# End www.jb51.cc
[root@jb51.cc Python-2.7.8]# vim /usr/bin/yum #!/usr/bin/python #修改此处为2.4的位置[root@jb51.cc ~]# vim /usr/bin/yum #!/usr/bin/python2.4[root@jb51.cc ~]# yum Loaded plugins: fastestmirrorYou need to give some commandusage: yum [options] COMMANDList of Commands:check-update Check for available package updatesclean Remove cached datadepList List a package's dependencIEsdowngrade downgrade a packageerase Remove a package or packages from your systemgroupinfo display details about a package groupgroupinstall Install the packages in a group on your systemgroupList List available package groupsgroupremove Remove the packages in a group from your systemhelp display a helpful usage messageinfo display details about a package or group of packagesinstall Install a package or packages on your systemList List a package or groups of packageslocalinstall Install a local RPM# End www.jb51.cc
yum 又可以使用了
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