python模块安装

1. 单文件模块
                直接把文件拷贝到$python_dir/lib

2. 多文件模块，带setup.py
                 python setup.py install          

找不到include的头文件,则：

CFLAGS=-I/opt/include/python2.5 python setup.py build/install

3. egg文件，类似Java的jar
                 1) 下载ez_setup.py,运行python ez_setup    
                 2)  easy_install *.egg