data.txt的内容为4369对于下面的代码,分析如果读入的文件是data.txt,则程序的输出是( )Def main():Done = FalseWhile not done:Try:Filename = input("please enter the file name:")Data = readfile(filename)Total=0For value in data:Total = total + valuePrint("the sum is", total)Done = TrueExcept IOError:Print("Error:file not found")Except ValueError:Print ("Error:file contents invalid")Except RuntimeError as error:Print("Error:", str(error))Def readfile(filename):Infile = open(filename, "r")Try:Return readdata(infile)Finally:Infile.close()Def readdata(infile):Line = infile.readline()Numberofvalues = int(line)Data = ]For i in range(numberofvalues):Line = infile.readline()Value = int(line)Data.append(value)Line = infile.readline()If line != "": #检测多于预期输入的异常Raise RuntimeError("End of file excepted.")Return dataIf __name__ == '__main__':Main()