python - 在 Python 中，为什么 [2] 小于 (1,)？

Question

背景

我一直在尝试找出为什么我的 AI 会做出一些疯狂的举动，并且我将问题追溯到使用 Python 2.7.2 时的以下行为

>>> print [2]>[1]
True
>>> print (2,)>(1,)
True
>>> print [2]>(1,)
False                 (WHY?)

>>> print [2]<[1]
False
>>> print (2,)<(1,)
False
>>> print [2]<(1,)
True                  (WHY?)

似乎列表总是小于元组。

这不是我对 documentation 的期望

Tuples and lists are compared lexicographically using comparison of corresponding elements. This means that to compare equal, each element must compare equal and the two sequences must be of the same type and have the same length.

If not equal, the sequences are ordered the same as their first differing elements. For example, cmp([1,2,x], [1,2,y]) returns the same as cmp(x,y). If the corresponding element does not exist, the shorter sequence is ordered first (for example, [1,2] < [1,2,3]).

问题

这里发生了什么？我是否允许比较元组和列表 - 或者我是否只允许比较同一类型与自身？

Answer 1

比较时不强制序列，因此比较它们的类型名称。

>>> 'list' < 'tuple'
True