meta programming in python

http://stackoverflow.com/questions/17330160/python-how-does-decorator-property-work

http://martyalchin.com/2007/nov/23/python-descriptors-part-1-of-2/

http://users.rcn.com/python/download/Descriptor.htm

http://www.ibm.com/developerworks/library/os-pythondescriptors/