def main(): # e0 = Element(0) # e1 = Element(1) # e2 = Element(2) # e3 = Element(3) rb = RingBuffer(4) rb.append(0) rb.append(1) rb.append(2) rb.append(3) rb.append(4) rb.append(5) print(rb.delete()) print(rb.delete()) print(rb.get_data())