from data_reader import DataReader data_reader = DataReader("sums_in_loop.txt") data = data_reader.get_table_float(" ") print(data) result_list = [] for line in data: result_list.append(line[0]) for index in range(0, len(line) - 1): if index > 0: result_list.append( float( round(((line[index - 1] + line[index] + line[index + 1]) / 3), 10))) result_list.append(line[len(line) - 1]) print(*result_list)