input: from typing import List
  
  
  def extract_data_from_webpage(url: str) -> List[str]:
      """ This function creates a web scraper that extracts all URLs from a given 
      webpage using the Python package BeautifulSoup.
      >>> extract_data_from_webpage("<url_of_webpage>")
      ['https://example.com/page1', 'https://example.com/page2']
      """
      
      import requests
      from bs4 import BeautifulSoup
  
      # Get the web page
      webpage = requests.get(url)
  
      # Parse the web page
      soup = BeautifulSoup(webpage.content, 'html.parser')
  
      # Find all 'a' tags
      links = soup.find_all('a')
  
      # Extract the URLs in the 'href' attribute
      extracted_urls = [link.get('href') for link in links]
      
      return extracted_urls
output:     # Filter out None values and non-absolute URLs
      extracted_urls = [url for url in extracted_urls if url and url.startswith('http')]
      
      return extracted_urls