python - 如何同时修改两个相互关联的列表？

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我有两个空白列表：intitialList和finalList，以及一个应该放入initialList的初始值和一个示例列表sampleList = [12,3,1,4,25,3,2,22,12,32,34,2,1,5,7]。现在，我要做的是编写一个程序，该程序将首先在initialList中插入初始值，然后进行一些计算，然后将值插入finalList中，然后finalList的第一个值成为第二个值。 initialList并再次进行一些计算，依此类推。之字形的东西。值以之字形方式填充。我的方法：

intialList = []
finalList = []
intialValue = 30
eff = 0.25
sampleList = [12,3,1,4,25,3,2,22,12,32,34,2,1,5,7]
for a in sampleList:
    if a < 10:
        intialList.append(intialValue)
        finalList.append(intialValue + intialValue*eff)
    else:
        intialList.append(intialValue)
        finalList.append(intialValue - intialValue*eff)
print("initial list:", intialList)
print("final list:", finalList)

我严重不知道该如何处理。
所需的输出：

initial list: [30, 22.5, 28.125, 35.156, 43.954, 32.96, 24.72]
finalist list: [22.5, 28.125, 35.156, 43.945, 32.96, 24.72]

结果存储在finalList中，首先将initial value存储在initialList的索引0中，然后将finalList的最终结果存储在initialList中。

最佳答案

根据您想要的输出，您想在intalValue迭代期间更改sampleList：

finalList = []
intialValue = 30
intialList = [intialValue]

eff = 0.25
sampleList = [12,3,1,4,25,3,2,22,12,32,34,2,1,5,7]


for a in sampleList:
    if a < 10:
        calculated_value = intialValue + intialValue * eff

    else:
        calculated_value = intialValue - intialValue * eff

    intialValue = calculated_value
    finalList.append(intialValue)
    intialList.append(intialValue)

print(intialList)
print(finalList)

输出：

[30, 22.5, 28.125, 35.15625, 43.9453125, 32.958984375, 41.19873046875, 51.4984130859375, 38.623809814453125, 28.967857360839844, 21.725893020629883, 16.294419765472412, 20.368024706840515, 25.460030883550644, 31.825038604438305, 39.78129825554788]
[22.5, 28.125, 35.15625, 43.9453125, 32.958984375, 41.19873046875, 51.4984130859375, 38.623809814453125, 28.967857360839844, 21.725893020629883, 16.294419765472412, 20.368024706840515, 25.460030883550644, 31.825038604438305, 39.78129825554788]