def operation_sequence(history_file):
history1 = LimitedFileHistory()
history2 = LimitedFileHistory()
history1.append('line4')
history2.append('line5')
history1.save_history_to_file(history_file)
history2.save_history_to_file(history_file)
def operation_sequence(history_file):
history_obj = LimitedFileHistory()
history_obj.read_history_file(history_file)
history_obj.append('line0')
history_obj.append('line1')
history_obj.append('line2')
history_obj.append('line3')
history_obj.save_history_to_file(history_file)