On 08.07.20 15:09, Hans Ginzel wrote:
Why not to allow tuple as a list index?
T = [[11, 12, 5, 2], [15, 6, 10], [10, 8, 12, 5], [12, 15, 8, 6]]
print(T[1][2])
10
print(T[1, 2])
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: list indices must be integers or slices, not tuple
Numpy offers this convenience for multi-dimensional arrays. But in
Python the sub-lists don't need to have the same length, so for example
T = [[1, 2, 3], [4], [5, 6, 7]]
and then `T[1, 2]` doesn't even exist. Also it could similarly mean "get
the second and third element from the list" which is what
`operator.itemgetter` does:
>>> operator.itemgetter(1, 2)(T)
([15, 6, 10], [10, 8, 12, 5])
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