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# mode: run
# ticket 636
# tag: slicing, getitem
class Sliceable(object):
"""
>>> sl = Sliceable()
>>> sl[1:2]
(1, 2, None)
>>> py_slice2(sl, 1, 2)
(1, 2, None)
>>> sl[1:None]
(1, None, None)
>>> py_slice2(sl, 1, None)
(1, None, None)
>>> sl[None:2]
(None, 2, None)
>>> py_slice2(sl, None, 2)
(None, 2, None)
>>> sl[None:None]
(None, None, None)
>>> py_slice2(sl, None, None)
(None, None, None)
"""
def __getitem__(self, sl):
return (sl.start, sl.stop, sl.step)
def py_slice2(obj,a,b):
"""
>>> [1,2,3][1:2]
[2]
>>> py_slice2([1,2,3], 1, 2)
[2]
>>> [1,2,3][None:2]
[1, 2]
>>> py_slice2([1,2,3], None, 2)
[1, 2]
>>> [1,2,3][None:None]
[1, 2, 3]
>>> py_slice2([1,2,3], None, None)
[1, 2, 3]
"""
return obj[a:b]
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