python列表作业备忘

L2 = [1,2,3,4]
L3 = L2.reverse() #reverse不返回列表，而是直接改变原列表
print(L3)
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None

print(" love ".join(["Everyday","Yourself","Python",]))
print(" love ".join(["Everyday","Yourself","Python"]))#在每个元素后买都加入"love"
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Everyday love Yourself love Python