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69 def set_difference_update(arr, *others): 70 pass
20 def sorted_list_difference(expected, actual): 21 i = j = 0 22 missing = [] 23 unexpected = [] 24 while True: 25 try: 26 e = expected[i] 27 a = actual[j] 28 if e < a: 29 missing.append(e) 30 i += 1 31 while expected[i] == e: 32 i += 1 33 34 elif e > a: 35 unexpected.append(a) 36 j += 1 37 while actual[j] == a: 38 j += 1 39 40 else: 41 i += 1 42 try: 43 while expected[i] == e: 44 i += 1 45 46 finally: 47 j += 1 48 while actual[j] == a: 49 j += 1 50 51 except IndexError: 52 missing.extend(expected[i:]) 53 unexpected.extend(actual[j:]) 54 break 55 56 return (missing, unexpected)