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这是一个创建于 1947 天前的主题，其中的信息可能已经有所发展或是发生改变。
>>> l = [i for i in range(1,33)]
>>> l
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32]
>>> len(l)
32
>>> l[:31]
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31]
l[:31]不是取后 31 个吗？怎么是前 31 个
>>> l
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32]
>>> len(l)
32
>>> l[:31]
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31]
l[:31]不是取后 31 个吗？怎么是前 31 个
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1
zooo 2020-07-02 17:55:33 +08:00
:31
我觉得 python 语法的含义是 0:31 然后把 0 省略了，所以就是前 31 |
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2
misaka19000 2020-07-02 17:57:31 +08:00
楼主 Python 在哪学的？
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