http://www.nasuinfo.or.jp/FreeSpace/kenji/sf/python/virtualMachine/PyVM.htm
http://coderepos.org/share/browser/docs/jbking/vmdoc/run.rst

Timer('bool(1)').timeit()
http://enbug.tdiary.net/20071227.html#p01
http://d.hatena.ne.jp/perezvon/20080102/1199301914

演算子 と with statement
http://d.hatena.ne.jp/SumiTomohiko/20070606/1181161592
http://jijixi.azito.com/cgi-bin/diary/index.rb?date=20070101