cython

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# ticket: t488
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"""
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>>> test()
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"""
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def test():
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    x = ...
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    assert x is Ellipsis
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    d = {}
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    d[...] = 1
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    assert d[...] == 1
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    del d[...]
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    assert ... not in d
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    d[..., ...] = 1
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    assert d[..., ...] == 1
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    assert d[..., Ellipsis] == 1
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    assert (Ellipsis, Ellipsis) in d
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    del d[..., ...]
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    assert (Ellipsis, Ellipsis) not in d
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