Switch to iframe by using switch_to.frame() method and switch back to default content page using switch_to.default_content().
Example:
Switch_To_Default_ContentPage_using_selenium_python.py
from selenium.webdriver.common.by import By
from selenium import webdriver
import time
driver = webdriver.Chrome("/Users/admin/Documents/Others/Drivers/chromedriver.exe") # Using Chrome Driver
driver.get("http://www.dummypoint.com/Frame.html")
assert "Selenium Template" in driver.title
# Switch to iframe by WebElement
time.sleep(2)
ele = driver.find_element(By.ID,"f2")
driver.switch_to.frame(ele)
# After switching get the text from iframe using ID locator
data = driver.find_element(By.ID,"framename")
print("Frame Name is : ",data.text)
# Switching back to normal content page from frame
time.sleep(2)
driver.switch_to.default_content()
# Get the text from webpage content page after switching back.
data = driver.find_element(By.ID,"framename")
print("content in the WebPage is : ",data.text)
time.sleep(5)
driver.quit()