human
Solve the following python programming problem given the following code:
def dumps(self, arg, proto = None) : 
    class PersPickler (self.pickler) : 
        def persistent_id(subself, obj) : 
            return self.persistent_id (obj) 
f = io.BytesIO () 
    p = PersPickler (f, f) 
    p.dump (arg) 
    f.seek (0) 
    return f.read () 

    
    

    Fix the buggy line: p = PersPickler (f, f)
assistant
#Here is Python program to fix the buggy line: p = PersPickler (f, f)
.

p = PersPickler (f, proto)