Python3: 为什么-1//10 = -1？

Question

1//10==0，带整数除法，所以-1//10！= 0 ? 你知道吗

MPython 3.7.0b3 (v3.7.0b3:4e7efa9c6f, Mar 29 2018, 18:42:04) [MSC v.1913 64 bit (AMD64)] on win32
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>>> -1 // 10
-1

这应该发生吗？你知道吗

Answer 1

这样解释比较容易：

运算//舍入“向左”整数，即

1//10 -> 0.1 -> 0
-1 //10 -> -0.1 -> -1 (as -1 on the X axis is to the left of -0.1)