human
Solve the following python programming problem given the following code:
@ classmethod 
def graph_from_items(cls, items) : 
    def edges_from_items(items) : 
        for i in items : 
            for d in i.depends : 
                (yield (i, d)) 
return digraphtools.graph_from_edges (edges_from_items (edges_from_items)) 

    
    

    Fix the buggy line: return digraphtools.graph_from_edges (edges_from_items (edges_from_items))
assistant
#Here is Python code to fix the buggy line: return digraphtools.

return digraphtools.graph_from_edges (edges_from_items (items))