索引函数未分配给duck

Question

我被困在这里

说明

使用.insert(index, item)）函数查找“duck”的索引。将该结果分配给名为duck_index的变量。

然后animals = ["aardvark", "badger", "duck", "emu", "fennec fox"] duck_index = animals.index("duck") animals.insert(2, "cobra") print animals 该索引处的字符串“cobra”。

代码

json.loads

Answer 1

答案是问题......

animals = ["aardvark", "badger", "duck", "emu", "fennec fox"]
duck_index = animals.index("duck")  # retrieve the index of "duck" and assign it to variable duck_index
animals.insert(duck_index, "cobra") # insert "cobra" at duck_index
print(animals)