What is ID in here? I want until the page loads completely ( which varies between 10 sec to 5 minutes). How do i identify the ID [duplicate]

try:
    element_present = EC.presence_of_element_located((By.ID, 'ptFloatingGrabHandlesaw_180490_6_1_3'))
    WebDriverWait(driver, timeout).until(element_present)
except TimeoutException:
    print ("Timed out waiting for page to load")