Method test00_simple

tables/tests/test_expression.py:1575–1624

Checking very large inputs.

(self)

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

    def test00_simple(self):
        """Checking very large inputs."""

        shape = self.shape
        # Use filters so as to not use too much space
        if tb.which_lib_version("blosc") is not None:
            filters = tb.Filters(complevel=1, complib="blosc", shuffle=False)
        elif tb.which_lib_version("lzo") is not None:
            filters = tb.Filters(complevel=1, complib="lzo", shuffle=False)
        else:
            filters = tb.Filters(complevel=1, shuffle=False)
        # Build input arrays
        root = self.h5file.root
        a = self.h5file.create_carray(
            root,
            "a",
            atom=tb.Float64Atom(dflt=3),
            shape=shape,
            filters=filters,
        )
        self.assertIsNotNone(a)
        b = self.h5file.create_carray(
            root,
            "b",
            atom=tb.Float64Atom(dflt=2),
            shape=shape,
            filters=filters,
        )
        self.assertIsNotNone(b)
        r1 = self.h5file.create_carray(
            root,
            "r1",
            atom=tb.Float64Atom(dflt=3),
            shape=shape,
            filters=filters,
        )
        # The expression
        expr = tb.Expr("a * b-6")  # Should give 0
        expr.set_output(r1)
        expr.eval()
        r1 = r1[-10:]  # Get the last ten rows
        r2 = np.zeros(10, dtype="float64")
        if common.verbose:
            print("Tested shape:", shape)
            print("Ten last rows:", repr(r1), r1.dtype)
            print("Should look like:", repr(r2), r2.dtype)
        self.assertTrue(
            common.areArraysEqual(r1, r2),
            "Evaluate is returning a wrong value.",
        )

    def test01_iter(self):
        """Checking very large inputs (__iter__ version)"""