python object typecasting
<p>Ive been trying search how to pass object reference in python and type cast it similar to Java but no to avail. I duno if this topic exists somewhere here. </p>

<p>My trouble is i have to pass the object reference to a class constructor. But i duno how to typecast the reference to an object. In java though I have accomplish this but i have to transfer the code to the server side. </p>

<p>many thanks,
Jack</p>

<pre><code>class SearchRectangle:
    def __init__(self, lower_left_subgrid_x, lower_left_subgrid_y, rectangle_width, rectangle_height):

        self.min_subgrid_x = int(lower_left_subgrid_x)
        self.max_subgrid_x = int(self.min_subgrid_x + rectangle_width -1)
        self.min_subgrid_y = int(lower_left_subgrid_y)
        self.max_subgrid_y = int(self.min_subgrid_y + rectangle_height -1)

     ...blah



class SearchRectangleMultiGrid:
 # parent rectangle should be a SearchRectangle instance 
    def __init__(self, parent_rectangle):
        self.parent_rectangle = SearchRectangle()parent_rectangle



    # test codes
    test_rect = SearchRectangle(test_subgrid.subgrid_x, test_subgrid.subgrid_y, 18, 18)
    print "\n\nTest SearchRectangle";
    print test_rect.to_string()
    print test_rect.sql_clause

    test_rec_multi = SearchRectangleMultiGrid(test_rect)
    print "\n\nTest SearchRectangleMulti"
    test_rec_multi.parent_rectangle.to_string()
</code></pre>
