python functools.partial

functools.partial

用一些默认参数包装一个可调用对象,返回结果是可调用对象，并且可以像原始对象一样对待

冻结部分函数位置函数或关键字参数，简化函数,更少更灵活的函数参数调用

refer to:

http://wiki.jikexueyuan.com/project/explore-python/Functional/partial.html