Method test08b2

tables/tests/test_tablesMD.py:1296–1346

Checking modifying one column (single column version, recarray, modify_column)

(self)

        self.assertEqual(table.nrows, 4)

    def test08b2(self):
        """Checking modifying one column (single column version, recarray,
        modify_column)"""

        if common.verbose:
            print("\n", "-=" * 30)
            print("Running %s.test08b2..." % self.__class__.__name__)

        # Create a new table:
        table = self.h5file.create_table(self.h5file.root, "recarray", Rec)

        # Append new rows
        s0, s1, s2, s3 = ["dbe"] * 3, ["ded"] * 3, ["db1"] * 3, ["de1"] * 3
        f0, f1, f2, f3 = (
            [[1.2] * 2] * 3,
            [[1.3] * 2] * 3,
            [[1.4] * 2] * 3,
            [[1.5] * 2] * 3,
        )
        r = np.rec.array(
            [([456, 457], s0, f0), ([2, 3], s1, f1)],
            formats="(2,)i4,(3,)S3,(3,2)f8",
        )
        table.append(r)
        table.append([([457, 458], s2, f2), ([5, 6], s3, f3)])

        # Modify just one existing column
        columns = np.rec.fromarrays(
            np.array([[[2, 3], [3, 4], [4, 5]]]), formats="i4"
        )
        table.modify_column(start=1, column=columns, colname="col1")

        # Create the modified recarray
        r1 = np.rec.array(
            [
                ([456, 457], s0, f0),
                ([2, 3], s1, f1),
                ([3, 4], s2, f2),
                ([4, 5], s3, f3),
            ],
            formats="(2,)i4,(3,)S3,(3,2)f8",
            names="col1,col2,col3",
        )

        # Read the modified table
        r2 = table.read()
        if common.verbose:
            print("Original table-->", repr(r2))
            print("Should look like-->", repr(r1))
        self.assertEqual(r1.tobytes(), r2.tobytes())
        self.assertEqual(table.nrows, 4)


class DefaultValues(common.TempFileMixin, common.PyTablesTestCase):