alert 窗口的类型：
警告框、确认框、对话框
操作 alert 窗口：
切换至 alert 窗口：driver.switch_to.alert
获取alert 窗口的值：alert.text
确定：alert.accept()
取消：alert.dismiss()
输入值：alert.send_keys("内容")
from selenium import webdriver标签：窗口,处理,text,driver,accept,alert,alert1 From： https://www.cnblogs.com/xianyumaixianyu/p/18278128
import time
driver = webdriver.Chrome()
driver.get("file:///C:/Users/Administrator/Desktop/alert.html")
driver.maximize_window()
def alert_demo_1():
# 警告框
alert1 = driver.find_element_by_id('bu1')
alert1.click()
# 切换至警告框
alert1 = driver.switch_to.alert
# 获取 alert 窗口的值
print(alert1.text)
# 点击确定
alert1.accept()