请问这个方法中，每隔多长时间进行一次随机操作，我想问的是随机操作过程中，间隔多长时间进行一次各类问题检测,方法如下： def random_operation(self, duration, package_name, app_name, timeout=25): crash_count, anr_count, flower_screen_count, black_screen_count, white_screen_count = 0, 0, 0, 0, 0 # 获取设备屏幕尺寸 screen = self.driver.get_window_size() screen_width = screen['width'] screen_height = screen['height'] start_time = time.time() last_operation_time = time.time() # 记录最后一次成功操作的时间 while time.time() - start_time < duration: # 检测全局超时 if time.time() - last_operation_time > timeout: print(f"操作超时（{timeout}秒无响应），结束测试") break #驻留检测 try: currentt_package = self.get_current_package().lower() target_package = package_name.lower() if currentt_package != target_package: print(f"当前包名不匹配目标！！！") self.driver.activate_app(package_name) time.sleep(3) last_operation_time = time.time() except Exception as e: print(f"驻留检测失败：{e}") try: # 随机选择操作类型（点击/滑动/输入） operation = random.choice(['click', 'swipe', 'input']) if operation == 'click': # 随机坐标点击 x = random.randint(0, screen_width) y = random.randint(0, screen_height) self.driver.tap([(x, y)], duration=50) time.sleep(0.3) elif operation == 'swipe': # 随机方向滑动（上下左右） direction = random.choice(['up', 'down', 'left', 'right']) if direction == 'up': self.driver.swipe(screen_width // 2, screen_height * 3 // 4, screen_width // 2, screen_height // 4, 500) elif direction == 'down': self.driver.swipe(screen_width // 2, screen_height // 4, screen_width // 2, screen_height * 3 // 4, 500) elif direction == 'left': self.driver.swipe(screen_width * 3 // 4, screen_height // 2, screen_width // 4, screen_height // 2, 500) elif direction == 'right': self.driver.swipe(screen_width // 4, screen_height // 2, screen_width * 3 // 4, screen_height // 2, 500) time.sleep(0.5) elif operation == 'input': input_elements = self.driver.find_elements(AppiumBy.CLASS_NAME, "android.widget.EditText") if input_elements: input_element = random.choice(input_elements) input_element.click() random_digits = ''.join(str(random.randint(0, 9)) for _ in range(random.randint(1, 10))) input_element.send_keys(random_digits) time.sleep(0.8) if self.check_app_crash(app_name): crash_count += 1 if self.check_app_anr(app_name): anr_count += 1 is_flower, is_black, is_white = self.verify_screen(app_name) if is_flower: flower_screen_count += 1 if is_black: black_screen_count += 1 if is_white: white_screen_count += 1 last_operation_time = time.time() except Exception as e: pass return (crash_count, anr_count, flower_screen_count, black_screen_count, white_screen_count)