How can selenium web driver get to know when the new window has opened and then resume its execution

Question

I am facing an issue in automating a web application using selenium web driver.

The webpage has a button which when clicked opens a new window. When I use the follow

Answer 1

You could wait until the operation succeeds e.g., in Python:

from selenium.common.exceptions    import NoSuchWindowException
from selenium.webdriver.support.ui import WebDriverWait

def found_window(name):
    def predicate(driver):
        try: driver.switch_to_window(name)
        except NoSuchWindowException:
             return False
        else:
             return True # found window
    return predicate

driver.find_element_by_id("id of the button that opens new window").click()        
WebDriverWait(driver, timeout=50).until(found_window("new window name"))
WebDriverWait(driver, timeout=10).until( # wait until the button is available
    lambda x: x.find_element_by_id("id of button present on newly opened window"))\
    .click()