def test_read_write_known():
    ctx = Context()

    needle = _default_context.keys()[0]
    assert ctx in needle
    assert ctx[needle] is not Nothing
    ctx[needle] = Nothing
    assert ctx[needle] is Nothing
dataset/ETHPy150Open jek/flatland/tests/markup/test_context.py/test_read_write_known/swapped operands of `in`