Method test04_maxFields

tables/tests/test_create.py:136–180

Checking a large number of fields in tables

(self)

        self.assertEqual(arr.get_attr("TITLE"), "t" * titlelength)

    def test04_maxFields(self):
        """Checking a large number of fields in tables"""

        # The number of fields for a table
        varnumber = tb.parameters.MAX_COLUMNS

        varnames = []
        for i in range(varnumber):
            varnames.append("int%d" % i)

        # Build a dictionary with the types as values and varnames as keys
        recordDict = {}
        i = 0
        for varname in varnames:
            recordDict[varname] = tb.Col.from_type("int32", dflt=1, pos=i)
            i += 1
        # Append this entry to indicate the alignment!
        recordDict["_v_align"] = "="
        table = self.h5file.create_table(
            self.root, "table", recordDict, "MetaRecord instance"
        )
        row = table.row
        listrows = []
        # Write 10 records
        for j in range(10):
            rowlist = []
            for i in range(len(table.colnames)):
                row[varnames[i]] = i * j
                rowlist.append(i * j)

            row.append()
            listrows.append(tuple(rowlist))

        # write data on disk
        table.flush()

        # Read all the data as a list
        listout = table.read().tolist()

        # Compare the input rowlist and output row list. They should
        # be equal.
        if common.verbose:
            print("Original row list:", listrows[-1])
            print("Retrieved row list:", listout[-1])
        self.assertEqual(listrows, listout)

    # The next limitation has been released. A warning is still there, though
    def test05_maxFieldsExceeded(self):