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def find_value_indexes(item_list, index_list, v):
""" (list of object, list of int, object) -> list of int
Precondition: the values in index_list are valid indexes in item_list.
v may appear multiple times in item_list. index_list contains zero or
more indexes.
Return a list of the indexes from index_list at which v
appears in item_list.
>>> find_value_indexes([6, 8, 8, 5, 8], [0, 2, 4], 8)
[2, 4]
"""
result = []
for i in range(len(item_list)):
for j in range(len(index_list)):
if item_list[i] == v:
result.append(index_list[j])
return result
我的函数不起作用,因为它返回的值超过了我应得的值。我能做什么?按值和索引列表筛选列表
想一想如果'index_list'的长度小于'item_list',即'i> j',会发生什么情况。当i的值大于j时,'index_list [i]'会打印什么? – Kamehameha