How to use the pymapd.cursor.Cursor function in pymapd

def test_connection_execute(self, con):
        result = con.execute("drop table if exists FOO;")
        result = con.execute("create table FOO (a int);")
        assert isinstance(result, Cursor)
        con.execute("drop table if exists FOO;")

def test_empty_iterable(self):
        c = Cursor(None)
        result = list(c)
        assert result == []

def test_arraysize(self):
        c = Cursor(None)
        assert c.arraysize == 1
        c.arraysize = 10
        assert c.arraysize == 10

        with pytest.raises(TypeError):
            c.arraysize = 'a'

def execute(self, operation, parameters=None):
        """Execute a SQL statement

        Parameters
        ----------
        operation: str
            A SQL statement to exucute

        Returns
        -------
        c: Cursor
        """
        c = Cursor(self)
        return c.execute(operation, parameters=parameters)

def cursor(self):
        """Create a new :class:`Cursor` object attached to this connection."""
        return Cursor(self)

def to_df(self):
        """Convert the cursor to a data frame.

        Returns
        -------
        dataframe : pandas.DataFrame
        """
        if isinstance(self.cursor, Cursor):
            col_names = [c.name for c in self.cursor.description]
            result = pd.DataFrame(self.cursor.fetchall(), columns=col_names)
        elif self.cursor is None:
            result = pd.DataFrame([])
        else:
            result = self.cursor

        return result