human
Solve the following python programming problem given the following code:
def pickletest(self, it, stop = 4, take = 1, compare = None) : 
    'Test that an iterator is the same after pickling, also when part-consumed' 
    def expand(it, i = 0) : 
        if (i > 10) : 
            raise RuntimeError ('infinite recursion encountered') 
if isinstance (it, str) : 
            return it 
try : 
            l = list (islice (it, stop)) 
except TypeError : 
            return it 
return [expand (e, (i + 1)) for e in l] 
dump = pickle.dumps (it) 
    i2 = pickle.loads (dump) 
    self.assertEqual (type (it), type (i2)) 
    (a, b) = (expand (it), expand (i2)) 
    self.assertEqual (a, b) 
    if compare : 
        c = expand (compare) 
        self.assertEqual (a, c) 
i3 = pickle.loads (dump) 
    took = 0 
    try : 
        for i in range (take) : 
            next (i3) 
            took += 1 
except StopIteration : 
        pass 
dump = pickle.dumps (i3) 
    i4 = pickle.loads (a) 
    (a, b) = (expand (i3), expand (i4)) 
    self.assertEqual (a, b) 
    if compare : 
        c = expand (compare [took :]) 
        self.assertEqual (a, c) 

    
    

    Fix the buggy line: i4 = pickle.loads (a)
assistant
#Here is Python code to fix the buggy line: i4 = pickle.

i4 = pickle.loads (dump)