number literals in python: hex, octal, and binary

http://stackoverflow.com/questions/1476/how-do-you-express-binary-literals-in-python

hex:   0x11 : using 0x
octal: 011  : starting with 0
binary: 0b11 : starting with 0b

print 0x11   => 11
print 011   => 9
print 0b11   => 3