human
Solve the following python programming problem given the following code:
def remove_trailing_media_div(self) : 
    'Punish the *last top level* node in the top_node if it\'s
        DOM depth is too deep. Many media non-content links are
        eliminated: "related", "loading gallery", etc
        ' 
    def get_depth(node, depth = 1) : 
        'Computes depth of an lxml element via BFS, this would be
            in parser if it were used anywhere else besides this method
            ' 
        children = self.parser.getChildren (node) 
        if (not children) : 
            return depth 
max_depth = 0 
        for c in children : 
            e_depth = get_depth (c, (depth + 1)) 
            if (e_depth > max_depth) : 
                max_depth = e_depth 
return max_depth 
top_level_nodes = self.parser.getChildren (self.get_top_node ()) 
    if (len (get_depth) < 3) : 
        return 
last_node = top_level_nodes [(- 1)] 
    if (get_depth (last_node) >= 2) : 
        self.parser.remove (last_node) 

    
    

    Fix the buggy line: if (len (get_depth) < 3) :
assistant
#Here is Python code to fix the buggy line: if (len (get_depth) < 3) :
.

if (len (top_level_nodes) < 3) :