如何在python中使用硒检查弹出警报

本文介绍了如何在python中使用硒检查弹出警报的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

如果要删除的网页中有弹出消息，我要继续下一次迭代.那就是如果有任何弹出消息，我要接受该消息并转到下一个项目，即转到循环的开头.

What I want is to continue with the next iteration if there is a pop up message in the webpage being scrapped. That is if there is any pop up message, I want to accept that message and go to the next item i.e go to the beginning of the loop.

为此，我使用以下代码段:

For this I use the following snippet of code:

from tkinter import * from tkinter import messagebox as msg from tkinter import filedialog as fd from tkinter import ttk from tkinter import StringVar as sv from selenium.webdriver.support.ui import WebDriverWait from selenium.webdriver.support import expected_conditions as EC from seleniummon.exceptions import TimeoutException for(i in range(0,5)): try: click_alert=driver.switch_to_alert() click_alert.accept() continue except TimeoutException: print('wrong value in'+i+'th row . Please check the value ')

出现以下错误:

Tkinter回调中的异常

Exception in Tkinter callback

Traceback (most recent call last): File "C:\ProgramData\Anaconda3\lib\tkinter\__init__.py", line 1699, in __call__ return self.func(*args) File "C:/Users/chowdhuryr/Desktop/ATT RESEARCH BOT/GUI.py", line 64, in printMessage self.Scrapper(str1,str2) File "C:/Users/chowdhuryr/Desktop/ATT RESEARCH BOT/GUI.py", line 163, in Scrapper click_alert=driver.switchTo().alert()

现在，我非常确定该错误出在click_alert=driver.switch_to_alert()上，因为我已经使用一些健全性检查对其进行了检查.

Now I am pretty certain that the error lies in click_alert=driver.switch_to_alert() because I have checked it using some sanity checks.

推荐答案

通常，我们不会在for后面加上括号.而且，当您打算切换时，警报似乎还不存在. for循环可能只是一个繁忙的等待，使CPU处于循环状态，因此，当警报窗口不存在时，您可以添加一段时间的睡眠，而不仅仅是保持CPU不必要的繁忙. 该代码段可以按以下方式更正:

Normally, we don't put parentheses after a for. And, also, it looks like the alert is not present yet when you intend to switch to. Your for-loop could be just a busy wait keeping CPU busy in your loop, so instead of just keeping CPU unnecessarily busy, you may add a sleep for a while when the alert window is not present yet. The code snippet could be corrected as below:

for i in range(0,5): try: click_alert=driver.switch_to_alert() click_alert.accept() continue except TimeoutException: print('wrong value in'+i+'th row . Please check the value ') except NoAlertPresentException: print('i = ', i, 'alert is not present yet, waiting for some time') time.sleep(60) # Delay for 1 minute (60 seconds) except: print "Unexpected error:", sys.exc_info()[0] raise