Python從數組索引中更改數組的值

Question

a=["a",["b",["c","d","e"],"f","g"],"h","j"] 
b=a 
index=[1,1,1] 
for c in index: 
    b=b[c] 
print("Value: "+b.__str__()) 
#Code for change value to "k" 
print(a)#result is ["a",["b",["c","k","e"],"f","g"],"h","j"] 

在那裏我可以獲取值，但我想將其更改爲另一個值。

yourDict [1] [1] [1] = 「測試」

不是這樣。索引必須來自數組。

Answer 1

yourDict['b']['d']['b'] = "test" 

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編輯 - OP提到，這是不能接受的，因爲索引必須來自任意長度的運行時定義的列表。

解決方案：

reduce(lambda d,i:d[i], indexList[:-1], yourDict)[indexList[-1]] = "test" 

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演示：

>>> yourDict = {'a':1, 'b':{'c':1, 'd': {'b':1}}} 
>>> indexList = ['b','d','b'] 

>>> reduce(lambda d,i:d[i], indexList[:-1], yourDict)[indexList[-1]] = "test" 
>>> yourDict 
{'a': 1, 'b': {'c': 1, 'd': {'b': 'test'}}} 

演示2：

>>> yourDict = {'a':1, 'b':{'c':1, 'd': {'b':1}}} 
>>> indexList=['a'] 

>>> reduce(lambda d,i:d[i], indexList[:-1], yourDict)[indexList[-1]] = "test" 
>>> yourDict 
{'a': 'test', 'b': {'c': 1, 'd': {'b': 1}}}