Question

我正在计算列表中两个值之间的百分比差异。

#cal percentage dff: (val2/val)/100
values = [0.11889, 0.07485, 0.01070, 0.03076, 0.01606]
values = [int(round(i*100)) for i in values]

conversion_values = []
for x in range(1, len(values), 1):
    val_1 = values[x-1]
    if val_1 == 0.0: #Check if val_1 is 0.
        conversion_values.append('-')
    else:
        val_2 = values[x]
        diff = (val_2/val_1)*100
        conversion_values.append(diff)

conversion_values

output:
[0, 0, 300, 0]

所需的输出：

   [58, 14, 300, 67]

不确定我在做什么错吗？在Excel中，此计算工作正常，但在此处不行，必须与小数点有关？

注意-这不是关于百分比变化的问题，完全是另一回事。

Answer 1

在执行(val_2)/val_1时，您失去了精度，因此将其中之一转换为float以获得浮点数的最终结果，然后将结果转换为int

values = [0.11889, 0.07485, 0.01070, 0.03076, 0.01606]
values = [int(round(i*100)) for i in values]

conversion_values = []
for x in range(1, len(values), 1):
    val_1 = values[x-1]
    if val_1 == 0.0: #Check if val_1 is 0.
        conversion_values.append('-')
    else:
        val_2 = values[x]
        diff = int(round((float(val_2)/val_1)*100)) # change to float -->round--> int
        conversion_values.append(diff)

conversion_values

输出：

[58, 14, 300, 67]

Answer 2

好像您正在使用整数除法。请重写此

diff = (val_2/val_1)*100

对此

diff = (val_2/float(val_1))*100

甚至对此

diff = (val_2/(val_1 * 1.0))*100

计算百分比差异-python

2 个答案: