Question: I am using Selenium Webdriver with Python for automation testing. While login my application I have got popup message for clicking 'OK' button. where i have used 

```
from selenium import webdriver 
def cbs_login(): 
    browser = webdriver.Firefox() 
    browser.get('172.20.31.1:7085/web/ccp/login') 
    user = browser.find_element_by_css_selector('#userid') 
    user.send_keys('admin') 
    password = browser.find_element_by_css_selector('#password')
    password.send_keys('admin2') 
    login_location = browser.find_element_by_css_selector('#loginlocation') 
    login_location.click() 
    location_name = browser.find_element_by_xpath('/html/body/div[2]/div/div/div‌​/div/div/form/div/di‌​v/div/div/table/tbod‌​y/tr[4]/td/select/op‌​tion[3]')     
    location_name.click() 
    driver.switchTo().alert().accept(); 
    cbs_login()

```

i can't use the code ,I am getting error like "unresolved reference" Please mention is there any alternate way to handle it by python 2.7 version.

Answer: 
`switchTo()` is not a `Python` method. You should try

```
browser.switch_to.alert.accept()

```

Also make sure that you have [correctly import WebDriver](https://stackoverflow.com/questions/21236824/unresolved-reference-issue-in-pycharm)
Please replace driver in as told by @andersson

```
driver.switch_to.alert.accept()

```

as browser and try

```
browser.switch_to.alert.accept()

```