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升级python到2.7

2015年9月8日

升级python到2.7
http://gavinshaw.blog.51cto.com/385947/610585/
眼看着python3 都出来了,vps上用的还是2.4的版本额,确实汗了一把。决定升级下python。
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。so 让我们升级吧!
查看系统当前python版本
2: [root@wangyuelou ~]# python
1:
3: Python 2.4.3 (#1, May 5 2011, 16:39:10)
4: [GCC 4.1.2 20080704 (Red Hat 4.1.2-50)] on linux2
5: Type “help”, “copyright”, “credits” or “license” for more information.
6: >;>>
7: [root@wangyuelou ~]#
下载新版本的python
1: [root@wangyuelou ~]# wget http://python.org/ftp/python/2.7.2/Python-2.7.2.tgz

解压缩 以及编译
1: [root@wangyuelou ~]# tar xvf Python-2.7.2.tar.bz2
2: [root@wangyuelou Python-2.7.2]# ./configure –prefix=/usr/local/python27
3: [root@wangyuelou Python-2.7.2]# make
4: [root@wangyuelou Python-2.7.2]# make install
5: [root@wangyuelou Python-2.7.2]# ls /usr/local/python27/ -al
6: total 28
7: drwxr-xr-x 6 root root 4096 Jul 14 00:21 .
8: drwxr-xr-x 20 root root 4096 Jul 14 00:17 ..
9: drwxr-xr-x 2 root root 4096 Jul 14 00:21 bin
10: drwxr-xr-x 3 root root 4096 Jul 14 00:21 include
11: drwxr-xr-x 4 root root 4096 Jul 14 00:21 lib
12: drwxr-xr-x 3 root root 4096 Jul 14 00:21 share
覆盖原来的python链接
1: [root@wangyuelou Python-2.7.2]# mv /usr/bin/python /usr/bin/python_old
2: [root@wangyuelou Python-2.7.2]# ln -s /usr/local/python27/bin/python /usr/bin/
3: [root@wangyuelou Python-2.7.2]# python
4: Python 2.7.2 (default, Jul 14 2011, 00:20:14)
5: [GCC 4.1.2 20080704 (Red Hat 4.1.2-50)] on linux2
6: Type “help”, “copyright”, “credits” or “license” for more information.
7: >>>
此处已经可以正常使用python2.7了
但是因为yum是使用的2.4的版本来用的,所以 还需要修改一下
1: [root@wangyuelou ~]# yum
2: There was a problem importing one of the Python modules
3: required to run yum. The error leading to this problem was:
4:
5: No module named yum
6:
7: Please install a package which provides this module, or
8: verify that the module is installed correctly.
9:
10: It’s possible that the above module doesn’t match the
11: current version of Python, which is:
12: 2.7.2 (default, Jul 14 2011, 00:20:14)
13: [GCC 4.1.2 20080704 (Red Hat 4.1.2-50)]
14:
15: If you cannot solve this problem yourself, please go to
16: the yum faq at:
17: http://wiki.linux.duke.edu/YumFaq
18:
19:
20: [root@wangyuelou Python-2.7.2]# vim /usr/bin/yum
21:
22: #!/usr/bin/python #修改此处为2.4的位置
23: [root@wangyuelou ~]# vim /usr/bin/yum
24:
25: #!/usr/bin/python2.4
26: [root@wangyuelou ~]# yum
27: Loaded plugins: fastestmirror
28: You need to give some command
29: usage: yum [options] COMMAND
30:
31: List of Commands:
32:
33: check-update Check for available package updates
34: clean Remove cached data
35: deplist List a package’s dependencies
36: downgrade downgrade a package
37: erase Remove a package or packages from your system
38: groupinfo Display details about a package group
39: groupinstall Install the packages in a group on your system
40: grouplist List available package groups
41: groupremove Remove the packages in a group from your system
42: help Display a helpful usage message
43: info Display details about a package or group of packages
44: install Install a package or packages on your system
45: list List a package or groups of packages
46: localinstall Install a local RPM
yum 又可以使用了

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