本文介绍了浮点数的range()的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

在Python中是否有 range()等于浮点数?

Is there a range() equivalent for floats in Python?

>>> range(0.5,5,1.5)
[0, 1, 2, 3, 4]
>>> range(0.5,5,0.5)

Traceback (most recent call last):
  File "<pyshell#10>", line 1, in <module>
    range(0.5,5,0.5)
ValueError: range() step argument must not be zero


推荐答案



如评论所述,这可能会产生不可预测的结果,例如:

As the comments mention, this could produce unpredictable results like:

>>> list(frange(0, 100, 0.1))[-1]
99.9999999999986

到要获得预期的结果,可以在此问题中使用其他答案之一,或者如@Tadhg所述,可以将 decimal.Decimal 用作跳转参数。请确保使用字符串而不是浮点数对其进行初始化。

To get the expected result, you can use one of the other answers in this question, or as @Tadhg mentioned, you can use decimal.Decimal as the jump argument. Make sure to initialize it with a string rather than a float.

>>> import decimal
>>> list(frange(0, 100, decimal.Decimal('0.1')))[-1]
Decimal('99.9')

甚至:

import decimal

def drange(x, y, jump):
  while x < y:
    yield float(x)
    x += decimal.Decimal(jump)

然后:

>>> list(drange(0, 100, '0.1'))[-1]
99.9

这篇关于浮点数的range()的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

07-14 20:49