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