human
Solve the following python programming problem given the following code:
def test_streaming(self) : 
    def cb(path, item) : 
        cb.count += 1 
        self.assertEqual (path, [('a', { 
            'x' : 'y', 
}), ('b', None)]) 
        self.assertEqual (item, str (cb.count)) 
        return True 
cb.count = 0 
    parse ('<a x="y"><b>1</b><b>2</b><b>3</b></a>', item_depth = 2, item_callback = self) 
    self.assertEqual (cb.count, 3) 

    
    

    Fix the buggy line: parse ('<a x="y"><b>1</b><b>2</b><b>3</b></a>', item_depth = 2, item_callback = self)
assistant
#Here is Python program to fix the buggy line: parse ('<a x="y"><b>1</b><b>2</b><b>3</b></a>', item_depth = 2, item_callback = self)
.

parse ('<a x="y"><b>1</b><b>2</b><b>3</b></a>', item_depth = 2, item_callback = cb)