答案。。。。
L=["Adam","Lisa","Bart"]
L.insert(2,"Paul")
print(L)
print(L[-1])
print(L[-2])
print(L[-3])
print(L[-4])
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L=["Adam","Lisa","Bart"]
L.insert(2,"Paul")
print(L)
print(L[-1])
print(L[-2])
print(L[-3])
print(L[-4])
2017-06-12
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