how to wait for page to load completely in selenium code example

Example 1: selenium java wait for page load

WebDriverWait wait = new WebDriverWait(driver, 20);
wait.until(ExpectedConditions.elementToBeClickable(lastElementToLoad));

Example 2: wait until page loads selenium javascript

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC 
 
driver=webdriver.Firefox()
driver.get("http://www.example.com") #This is a dummy website URl
try:
    elem=WebDriverWait(driver,10).until(
        EC.presence_of_element_located((By.ID,"Element_to_be_found")) #This is a dummy element</span>
    )
finally:
    driver.quit()