test_period.py 文件源码

def test_union(self):
        index = period_range('1/1/2000', '1/20/2000', freq='D')

        result = index[:-5].union(index[10:])
        self.assertTrue(result.equals(index))

        # not in order
        result = _permute(index[:-5]).union(_permute(index[10:]))
        self.assertTrue(result.equals(index))

        # raise if different frequencies
        index = period_range('1/1/2000', '1/20/2000', freq='D')
        index2 = period_range('1/1/2000', '1/20/2000', freq='W-WED')
        self.assertRaises(ValueError, index.union, index2)

        self.assertRaises(ValueError, index.join, index.to_timestamp())

        index3 = period_range('1/1/2000', '1/20/2000', freq='2D')
        self.assertRaises(ValueError, index.join, index3)