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"""

Extended slicing:

>>> s = SliceViewer()

>>> s[1]

1

>>> s[:]

slice(None, None, None)

>>> s[1:2]

slice(1, 2, None)

>>> s[1:2:3]

slice(1, 2, 3)

>>> s[1:2:3:4]

Traceback (most recent call last):

...

SyntaxError: invalid syntax

N-dimensional indexing:

>>> s[1, 2]

(1, 2)

N-dimensional slicing:

>>> s[1:3, 2]

(slice(1, 3, None), 2)

>>> s[1, :2:]

(1, slice(None, 2, None))

>>> s[:, :]

(slice(None, None, None), slice(None, None, None))

"""

class SliceViewer:

def __getitem__(self, position):

return position