Method test08_AppendModifyRows

tables/tests/test_tables.py:2143–2339

Checking whether blosc2 optimized appending *and* reading rows works or not

(self)

        self.assertEqual(row[2], b"." * 4)

    def test08_AppendModifyRows(self):
        """Checking whether blosc2 optimized appending *and* reading rows works or not"""

        class Particle(tb.IsDescription):
            name = tb.StringCol(16, pos=1)  # 16-character String
            lati = tb.Int32Col(pos=2)  # integer
            longi = tb.Int32Col(pos=3)  # integer
            pressure = tb.Float32Col(pos=4)  # float  (single-precision)
            temperature = tb.Float64Col(pos=5)  # double (double-precision)

        # Now, open it, but in "append" mode
        self.h5file = tb.open_file(self.h5fname, mode="a")

        # Create a new group
        group = self.h5file.create_group(self.h5file.root, "newgroup")

        # Create a new table in newgroup group
        table = self.h5file.create_table(
            group,
            "table",
            Particle,
            "A table",
            tb.Filters(
                complevel=self.compress,
                shuffle=bool(self.shuffle),
                bitshuffle=bool(self.bitshuffle),
                complib=self.complib,
            ),
            chunkshape=3,
        )

        self.rootgroup = self.h5file.root.newgroup
        if common.verbose:
            print("\n", "-=" * 30)
            print(
                "Running %s.test08_AppendModifyRows..."
                % self.__class__.__name__
            )

        if common.verbose:
            print("Nrows in old", table._v_pathname, ":", table.nrows)
            print("Record Format ==>", table.description._v_nested_formats)
            print("Record Size ==>", table.rowsize)

        # Add a couple of user attrs
        table.attrs.user_attr1 = 1.023
        table.attrs.user_attr2 = "This is the second user attr"

        # Append several rows in only one call
        for j in range(200):
            i = 13 * j
            table.append(
                [(f"Particle: {i:6d}", i, 10 - i, float(i * i), float(i**2))]
            )

            table.append(
                [
                    (