input: Write a python function to extract and print the list of books from the Wikipedia page about Python programming language.
  assert extract_books()[0].startswith('Python')
  assert 'Learning Python' in extract_books()
  assert len(extract_books()) > 5
output: def extract_books():
      import requests
      from bs4 import BeautifulSoup
      
      url = 'https://en.wikipedia.org/wiki/Python_(programming_language)'
      response = requests.get(url)
      soup = BeautifulSoup(response.text, 'html.parser')
      
      # Find the Books section
      books_section = soup.find(id='Books')
      if not books_section:
          return []
      
      # Find the list of books
      books_list = books_section.find_next('ul')
      if not books_list:
          return []
      
      # Extract the text of each book
      books = [li.get_text().strip() for li in books_list.find_all('li')]
      return books