Python——对列表中的当前元素和下一个元素做些什么？

Question

我想在列表中的当前元素和下一个元素上执行一个函数，比方说打印。当您到达列表中的最后一个元素时，您如何做到这一点而不会出现错误？

some_list = ["one", "two", "three"]

期望的输出:

curr_item: "one"
next_item: "two"

curr_item: "two"
next_item: "three"

curr_item: "three"
next_item: "end"

我尝试过的:

index = 0
for item in list_name[:-1]:
    print item, list_name[index+1]
    index = index+1

Answer 1

您可以压缩列表:

some_list = ["one", "two", "three"]

for cur, nxt in zip (some_list, some_list [1:] ):
    print (cur, nxt)

或者如果你想要 end 值:

for cur, nxt in zip (some_list, some_list [1:] + ['end'] ):
    print (cur, nxt)