Hi Sachin, are you getting any errors in your logs for this script? I tried to run this same code snippet and its navigating to the URL also. So please try checking your driver path (I have changed only that to my driver path). Also are you providing IE application path or IE driver path in this line:
drv = webdriver.Ie(executable_path=r"C:\Program Files (x86)\Internet Explorer\iexplore.exe")
This should be your IE driver path, which you could download from here: https://goo.gl/AtHQuv (64-bit Windows IE driver) or https://goo.gl/9Cqa4q (32-bit Windows IE driver)