升级安装python 2.7.11

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　　rehat 6.5 安装python2.7.11(系统里已存在2.6)
　　wget https://www.python.org/ftp/python/2.7.11/Python-2.7.11.tar.xz
　　tar [J]xvf Python-2.7.11.tar.xz
　　cd Python-2.7.11
　　./configure --prefix=/usr/ --enable-shared --with-system-expat --with-system-ffi --enable-unicode=ucs4 && make && make install
　　echo $?
　　chmod -v 755 /usr/lib/libpython2.7.so.1.0
　　vim /etc/ld.so.conf
　　添加include  /usr/lib
　　/sbin/ldconfig
　　/sbin/ldconfig -v
　　python
　　--with-system-expat: This switch enables linking against system version of Expat.
　　--with-system-ffi: This switch enables linking against system version of libffi. Remove if you have not installed libffi-3.2.1.
　　--enable-unicode=ucs4: This switch enables 32bit Unicode support in Python.
　　要求python编译的时候，需要有动态链接库即加上--enable-shared
　　将tab.py放到/usr/lib/python2.7/site-packages/