Method test08c

tables/tests/test_tables.py:5401–5443

Checking modifying one column (single column version, single element)

(self)

        self.assertEqual(table.nrows, 4)

    def test08c(self):
        """Checking modifying one column (single column version,
        single element)"""

        if common.verbose:
            print("\n", "-=" * 30)
            print("Running %s.test08c..." % self.__class__.__name__)

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

        # append new rows
        r = np.rec.array(
            [(456, b"dbe", 1.2), (2, b"ded", 1.3)], formats="i4,S3,f8"
        )
        table.append(r)
        table.append([(457, b"db1", 1.2), (5, b"de1", 1.3)])

        # Modify just one existing column
        # columns = np.rec.fromarrays(np.array([[4]]), formats="i4")
        # table.modify_columns(start=1, columns=columns, names=["col1"])
        table.modify_columns(start=1, columns=[[4]], names=["col1"])
        # Create the modified recarray
        r1 = np.rec.array(
            [
                (456, b"dbe", 1.2),
                (4, b"ded", 1.3),
                (457, b"db1", 1.2),
                (5, b"de1", 1.3),
            ],
            formats="i4,S3,f8",
            names="col1,col2,col3",
        )
        # Read the modified table
        if self.reopen:
            self._reopen()
            table = self.h5file.root.recarray
        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)

    def test09a(self):
        """Checking modifying table columns (multiple column version)"""