用Python写一个随机数加减乘除

可以使用Python内置的random模块来生成随机数，然后通过用户输入来选择加减乘除的操作。

以下是示例代码：

import random

def generate_question():
    """生成随机问题"""
    num1 = random.randint(1, 100)
    num2 = random.randint(1, 100)
    operator = random.choice(['+', '-', '*', '/'])
    question = f"{num1} {operator} {num2}"
    return question

def evaluate_answer(question, answer):
    """验证答案是否正确"""
    result = eval(question)
    if abs(result - answer) < 1e-6:
        return True
    else:
        return False

if __name__ == '__main__':
    while True:
        question = generate_question()
        answer = input(f"What is the result of {question}? ")
        try:
            answer = float(answer)
        except ValueError:
            print("Invalid input, please try again.")
            continue
        if evaluate_answer(question, answer):
            print("Correct!")
        else:
            print("Wrong answer, please try again.")

运行上述代码后，程序将会不断地生成随机问题，等待用户输入答案。如果答案正确，则输出"Correct!"，否则输出"Wrong answer, please try again."，并重新生成一个新的随机问题。