zip的概念比较难以理解，它接收N个可遍历的数据，返回一个组合后的数据的迭代器。zip可以用来分解重构dict等数据结构。

Make an iterator that aggregates elements from each of the iterables.

Returns an iterator of tuples, where the i-th tuple contains the i-th element from each of the argument sequences or iterables. The iterator stops when the shortest input iterable is exhausted. With a single iterable argument, it returns an iterator of 1-tuples. With no arguments, it returns an empty iterator.

示例代码如下：

ages = {
        'laomeng':32,
        'laozhang':35,
        'laoli':36,
        'xiaowang':24,
        'xiaohuang':28
        }

max_age=max(zip(ages.values(),ages.keys()))
print(max_age)
min_age=min(zip(ages.values(),ages.keys()))
print(min_age)

print()

sages=sorted(zip(ages.values(),ages.keys()))
for (age,name) in sages:
    print(name,age)

参考资料：

http://docs.python.org/3/library/functions.html#zip