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序列赋值
>>> nudge = 1
>>> wink...=2
>>> A,B = nudge,wink
>>> A,B
(1, 2)
>>> [C,D] = [nudge,wink]
>>> C,D
(1, 2)
>>> nudge = 1
>>> wink...=2
>>> nudge,wink = wink,nudge
>>> nudge,wink
(2, 1)
元组赋值语句可以得到Python中一个常用的编写代码的技巧。