在字段计算器的代码块对话框写入下列代码: rec="" def autoIncrement(a): global rec if (a > 68 and a <=75.65): rec ="4级" elif(a > 75.65 and a <=80.00): rec ="3级" elif(a > 80.00 and a <=84.35): rec ="2级" elif(a > 84.35 and a <=91.50): rec ="1级" else: rec = "" return rec 在代码块下面的对话框中写入: autoIncrement(!a!)