第一题：

import random#初始化 No=[] Javaaverage=[] Caverage=[] Pythonaverage=[] Averageaverage=[] #随机生成学号 print("学号\t\t\t姓名\t\tjava\tC语言\tPython\t平均成绩\t") name=['小谢','小祥','小辉','小知','小离'] for i in range(5):     No= 20170000 + random.randint(0, 9999)     a = random.randint(60, 100)     Javaaverage.append(a)     b = random.randint(60, 100)     Caverage.append(b)     pythonaverage = random.randint(60, 100)     Pythonaverage.append(pythonaverage)     averageaverage=(a+b+pythonaverage)/3     Averageaverage.append(averageaverage)     print("%d\t%s\t\t%d\t\t%d\t\t%d\t\t%.2f\t\t"%(No,name[i],a,b,pythonaverage,averageaverage)) print("Java平均成绩：") average_Javaaverage=(Javaaverage[0]+Javaaverage[1]+Javaaverage[2]+Javaaverage[3]+Javaaverage[4])/5 print(average_Javaaverage) print("C语言平均成绩：") average_Caverage=(Caverage[0]+Caverage[1]+Caverage[2]+Caverage[3]+Caverage[4])/5 print(average_Caverage) print("Python平均成绩：") average_Pythonaverage=(Pythonaverage[0]+Pythonaverage[1]+Pythonaverage[2]+Pythonaverage[3]+Pythonaverage[4])/5 print(average_Pythonaverage) Max=max(Pythonaverage) Min=min(Pythonaverage) average_Python=(Pythonaverage[0]+Pythonaverage[1]+Pythonaverage[2]+Pythonaverage[3]+Pythonaverage[4])/5 print("Python平均成绩：%.2f\t\tPython成绩最高为：%.2f\t\tPython成绩最低为：%.2f\t\t"%(average_Python,Max,Min))

 https://gitee.com/qbz140258/knowing_and_leaving/commit/0c143a10418b11e8aae41db03b1117bd36147e95

第二题：

print("请输入以Y或$表示的金额:") cash=input() try:     eval(cash[1:]) except NameError:     print("错误，第二位开始请输入整数") except SyntaxError:     print("错误，第二位开始请输入整数") if cash[0] in ['Y']:     cashy = eval(cash[1:]) / 6     print("${:.2f}".format(cashy)) elif cash[0] in ['$']:     money = 6 * eval(cash[1:])     print("Y{:.2f}".format(money)) else:     print("错误，第一位输入Y或$")

https://gitee.com/qbz140258/knowing_and_leaving/commit/4ddd2e945399d2d57dc9b373cc5e8f454df31406