input: Write a python function to scrape the title of a webpage using BeautifulSoup.
  assert get_page_title('https://example.com/') == "Example Domain"
  assert get_page_title('https://www.python.org/') == "Welcome to Python.org"
  assert get_page_title('https://www.wikipedia.org/') == "Wikipedia"
output: def get_page_title(url):
      import requests
      from bs4 import BeautifulSoup
      
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      return soup.title.string