python随机生成运算符_我怎样才能随机选择一个数学运算符并用它来问重复出现的数学问题？...
不如做一个字典，把运算符的字符(如“+”)映射到运算符(如operator.add)。然后采样，格式化字符串，并执行该操作。import random
import operator
生成随机数学表达式def randomCalc():
ops = {'+':operator.add,
'-':operator.sub,
'*':operator.mul,
'/':operator.truediv}
num1 = random.randint(0,12)
num2 = random.randint(1,10) # I don't sample 0's to protect against divide-by-zero
op = random.choice(list(ops.keys()))
answer = ops.get(op)(num1,num2)
print('What is {} {} {}?\n'.format(num1, op, num2))
return answer
询问用户def askQuestion():
answer = randomCalc()
guess = float(input())
return guess == answer
最后做一个多问题测验def quiz():
print('Welcome. This is a 10 question math quiz\n')
score = 0
for i in range(10):
correct = askQuestion()
if correct:
score += 1
print('Correct!\n')
else:
print('Incorrect!\n')
return 'Your score was {}/10'.format(score)
一些测试>>> quiz()
Welcome. This is a 10 question math quiz
What is 8 - 6?
2
Correct!
What is 10 + 6?
16
Correct!
What is 12 - 1?
11
Correct!
What is 9 + 4?
13
Correct!
What is 0 - 8?
-8
Correct!
What is 1 * 1?
5
Incorrect!
What is 5 * 8?
40
Correct!
What is 11 / 1?
11
Correct!
What is 1 / 4?
0.25
Correct!
What is 1 * 1?
1
Correct!
'Your score was 9/10'