Python如何变换一个数值的符号，比如5变成-5, -9变成9，谢过。
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This topic created in 4333 days ago, the information mentioned may be changed or developed.
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1
mengzhuo Jul 29, 2014
x = -x
-------------------- 每天正能量，坚持不吐槽 |
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2
hotcha0111 Jul 29, 2014
n = ~n + 1
... |
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3
lovecook OP 楼上的方法试了，都可以呃，谢谢了。
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