2014/5/14:
anonymous-function-lambda.
https://www.inkling.com/read/learning-python-mark-lutz-4th/chapter-19/anonymous-functions-lambda
python lambda中的if/else
http://stackoverflow.com/questions/1585322/is-there-a-way-to-perform-if-in-pythons-lambda
康德尔，哥德尔，图灵
http://mindhacks.cn/2006/10/15/cantor-godel-turing-an-eternal-golden-diagonal/
lambda 字典递归举穷
http://www.blackglory.me/python-lambda-anonymous-recursive/
2014/5/15:
wiki/Lambda_calculus
http://en.wikipedia.org/wiki/Lambda_calculus