Code

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

# Constants
WIKIPEDIA_URL = "https://en.wikipedia.org"
USERNAME = "your_username"
PASSWORD = "your_password"

# Initialize the WebDriver
driver = webdriver.Chrome()  # or any other browser driver you are using
wait = WebDriverWait(driver, 10)

def login():
    driver.get(f"{WIKIPEDIA_URL}/w/index.php?title=Special:UserLogin")
    wait.until(EC.presence_of_element_located((By.ID, "wpName1"))).send_keys(USERNAME)
    driver.find_element(By.ID, "wpPassword1").send_keys(PASSWORD)
    driver.find_element(By.ID, "wpRemember").click()  # Remember me option
    driver.find_element(By.ID, "wpLoginAttempt").click()

def search(topic):
    search_box = wait.until(EC.presence_of_element_located((By.NAME, "search")))
    search_box.send_keys(topic)
    search_box.send_keys(Keys.RETURN)

def change_appearance():
    # Navigating to preferences (User Preferences)
    driver.get(f"{WIKIPEDIA_URL}/w/index.php?title=Special:Preferences")
    skin_link = wait.until(EC.presence_of_element_located((By.LINK_TEXT, "Appearance")))
    skin_link.click()

    # Selecting a different skin (example: Vector)
    vector_skin = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "input[value='vector']")))
    vector_skin.click()
    
    # Save the changes
    save_button = wait.until(EC.presence_of_element_located((By.ID, "prefcontrol")))
    save_button.click()

def navigate_and_scroll():
    # Navigate to the main page
    driver.get(f"{WIKIPEDIA_URL}/wiki/Main_Page")

    # Scroll to the bottom of the page
    driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")

def click_link():
    # Click on a random link on the Main Page
    link = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "#mp-upper .mp-h2 a")))
    link.click()

def logout():
    driver.get(f"{WIKIPEDIA_URL}/w/index.php?title=Special:UserLogout")
    confirm_logout = wait.until(EC.presence_of_element_located((By.LINK_TEXT, "log out")))
    confirm_logout.click()

try:
    login()
    search("Selenium (software)")
    change_appearance()
    navigate_and_scroll()
    click_link()
finally:
    logout()
    driver.quit()