如何强制除法为浮点数?除法不断四舍五入为0?

问题描述

我有两个整数值 ab,但我需要它们的浮点比率.我知道 a <b 并且我想计算 a/b,所以如果我使用整数除法,我将始终得到 0,余数为 a.

I have two integer values a and b, but I need their ratio in floating point. I know that a < b and I want to calculate a / b, so if I use integer division I'll always get 0 with a remainder of a.

如何在下面的 Python 中强制 c 为浮点数?

How can I force c to be a floating point number in Python in the following?

c = a / b


解决方案

在 Python 2 中,两个整数相除产生一个整数.在 Python 3 中,它产生一个浮点数.我们可以通过从 __future__ 导入来获得新的行为.

In Python 2, division of two ints produces an int. In Python 3, it produces a float. We can get the new behaviour by importing from __future__.

>>> from __future__ import division
>>> a = 4
>>> b = 6
>>> c = a / b
>>> c
0.66666666666666663

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