提取随机数并逐步排除生成的随机数的函数

import random

class RandomNumberGenerator:
    def __init__(self, start, end):
        self.start = start
        self.end = end
        self.generated_numbers = set()

    def generate_random_number(self):
        if len(self.generated_numbers) == (self.end - self.start + 1):
            return None  # 所有可能的随机数已经生成完毕

        while True:
            random_number = random.randint(self.start, self.end)
            if random_number not in self.generated_numbers:
                self.generated_numbers.add(random_number)
                return random_number