Python ---- list和dict遍历

refer to:

http://www.cnblogs.com/icejoywoo/p/3531869.html

 

对于python3, 可能有不一样之处,   refer to:

http://docspy3zh.readthedocs.io/en/latest/tutorial/datastructures.html

 

dict 几种遍历方式的效率差比别:

http://blog.csdn.net/cugbabybear/article/details/25037687