import randomdef generate():ope = ['+', '-', '*', '/']num1 = random.randint(1, 10)    # 随机生成1-10之间的数字num2 = random.randint(1, 10)num3 = random.randint(1, 10)num4 = random.randint(1, 10)ope1 = random.choice(ope)       # 随机生成运算符ope2 = random.choice(ope)ope3 = random.choice(ope)exp = str(num1) + str(ope1) + str(num2) + str(ope2) + str(num3) + str(ope3) + str(num4)return expret = []
for i in range(20):ret.append(generate())
k = 0
for el in ret:print(el)print('?', end="")answer = float(input())if answer == eval(el):     # eval()计算表达式的值k += 1print('答对啦，你真是个天才!')else:print('再想想吧，答案似乎是%d喔!' % (eval(el)))
print('你一共答对%d道题，共20道题。' % k)

    ope = ['+', '-', '*', '/']bra = ['(', '', ')']      # 0:生成左括号 1：不生成括号 2：生成右括号num1 = random.randint(1, 10)num2 = random.randint(1, 10)num3 = random.randint(1, 10)num4 = random.randint(1, 10)ope1 = random.choice(ope)ope2 = random.choice(ope)ope3 = random.choice(ope)left1 = random.randint(0, 1)left2 = random.randint(0, 1)left3 = random.randint(0, 1)right1 = random.randint(1, 2)right2 = random.randint(1, 2)right3 = random.randint(1, 2)if left1 == 0:           # 括号成对出现的情况left2 = 1left3 = 1if right1 == 2:right2 = 1right3 = 1else:right2 = 2right3 = 1else:if left2 == 0:left3 = 1right1 = 1if right2 == 2:right3 = 1else:right3 = 2else:left3 = 0right1 = 1right2 = 1right3 = 2exp = bra[left1] + str(num1) + str(ope1) + bra[left2] + str(num2) + \         # 在功能一的算术式中加入括号可能出现的位置bra[right1] + str(ope2) + bra[left3] + str(num3) + bra[right2] + \str(ope3) + str(num4) + bra[right3]return exp

if __name__ == "__main__":import argparseparser = argparse.ArgumentParser()parser.add_argument("-c", "--cin")args = parser.parse_args()if args.cin is None:f4().unlimited()else:f4().limited(args.cin)

        num1 = random.uniform(0, 1)num1 = random.Fraction(num1).limit_denominator(10)num2 = random.uniform(0, 1)num2 = random.Fraction(num2).limit_denominator(10)

    def answer(self, eq):from fractions import Fraction as fanswer = f(eval(eq)).limit_denominator(1000)answer = str(answer)return answer