[root@localhost ~]# cd /home/
[root@localhost home]# cd niuxl/Python-2.7.4
[root@localhost Python-2.7.4]# ls
config.guess configure Demo Grammar install-sh LICENSE Makefile.pre.in Modules Parser PCbuild Python RISCOS Tools
config.sub configure.ac Doc Include Lib Mac Misc Objects PC pyconfig.h.in README setup.py

编译之前，如果没有需要先安装zlib包：

[root@localhost Python-2.7.4]# ./configure --prefix=/usr/local/python2.7.4
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking for --enable-universalsdk... no
checking for --with-universal-archs... 32-bit
checking MACHDEP... linux2
checking EXTRAPLATDIR...
checking for --without-gcc... no
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/home/niuxl/Python-2.7.4':
configure: error: no acceptable C compiler found in $PATH

缺少c编辑器

安装c编辑器

..略

继续编译python

[root@localhost Python-2.7.4]# ./configure --prefix=/usr/local/python2.7.4

..(略)

ok编译成功

[root@localhost Python-2.7.4]# make && make install

安装成功

[root@localhost Python-2.7.4]# python -V
Python 2.4.3

目前版本依然是2.4.3，现在开始升级python，

查看python命令所在目录

[root@localhost Python-2.7.4]# whereis python
python: /usr/bin/python2.4 /usr/bin/python /usr/lib/python2.4 /usr/include/python2.4 /usr/share/man/man1/python.1.gz

将/usr/bin/python 的软连接修改为python2.4.3

[root@localhost Python-2.7.4]# mv /usr/bin/python /usr/bin/python2.4.3

[root@localhost Python-2.7.4]# python
-bash: /usr/bin/python: 没有那个文件或目录

python命令找不到，这时只需要将版本python2.7.4命令加入环境变量即可！

方式1：

修改/etc/profile加入如下两行：

PATH=$PATH:/usr/local/python2.7.4/bin
export PATH

然后

[root@localhost Python-2.7.4]# source /etc/profile

[root@localhost Python-2.7.4]# python -V
Python 2.7.4

当然也可以创建2.7.4版本的python的软连接：/usr/bin/python

[root@localhost ~]# ln -s /usr/local/python2.7.4/bin/python /usr/bin/python