Real Value in python:
Any object can be tested truth value, use an condition example, 0, 0.0 example, -defined classes, the defines a () () method, when that method returns the integer zero bool value False. [1 built- functions that have a Boolean result always 0 False false 1 True true, unless otherwise stated. (Important exception: the Boolean operations always one of their operands.)
Summary:
( x, y = 2 (.format(x, y, x x1, y1 = 0, 10 (.format(x1, y1, x1 x2, y2 = (.format(x2, y2, x2 ( * 50 ( (.format(x, y, x x1, y1 = 0, 10 (.format(x1, y1, x1 x2, y2 = (.format(x2, y2, x2 ( * 50 ( x = 2 (.format(x, x = (.format(x, x))
Python 3.3.2 (v3.3.2:d047928ae3f6, May 16 2013, 00:03:43) [MSC v.1600 32, >>> ================================ RESTART ================================>>> y -> x false,then y, 2 0 = 2 10 = 10 0 =x y -> x false,then x, 2 0 = 10 = 0 = x -> x false,then True, 2 = 0 =>>>