input: Write a function to build a web scraper in Python that collects all the links from a given website URL. The function should return a list of all the links found on the page. If the URL is invalid or if the page cannot be fetched, the function should return an empty list.
  assert scrape_links("http://www.example.com/")==["http://www.iana.org/domains/example"]
  assert scrape_links("invalid-url")==[]
  assert scrape_links("")==[]
output: import requests
  from bs4 import BeautifulSoup
  
  def scrape_links(url):
      try:
          response = requests.get(url)
          response.raise_for_status()
      except:
          return []
      
      soup = BeautifulSoup(response.text, 'html.parser')
      links = [a['href'] for a in soup.find_all('a', href=True)]
      return links