'Create a new column in an existing table using the item access syntax'

def test_set_new_unmasked_col_existing_table(self, table_types):

    self._setup(table_types)
    t = table_types.Table([self.a])
    b = table.Column(name='b', data=[1, 2, 3])
    t['b'] = b
    assert np.all((t['b'] == b))
