python 负数开立方根

要计算Python中负数的立方根，可以使用以下代码片段：

cube = float(input('请输入一个数：'))
epsilon = 0.0001
low = -abs(cube)
high = abs(cube)
guess = (high + low) / 2.0

if cube == 0.0:
    print(guess, '是', cube, '的立方根的近似解')
else:
    while abs(guess**3 - abs(cube)) >= epsilon:
        if guess**3 < abs(cube):
            low = guess
        else:
            high = guess
        guess = (high + low) / 2.0

    if cube > 0:
        print(guess, '是', cube, '的立方根的近似解')
    else:
        print('-', guess, '是', cube, '的立方根的近似解')

这段代码会先将`cube`的绝对值作为上界`high`，并将负的绝对值作为下界`low`，然后进行二分法计算立方根的近似解。如果输入的负数`cube`为0，则会直接输出`cube`作为立方根的近似解。最后，根据`cube`的正负性，分别输出结果。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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