input: Write a function to create a web scraper using Python BeautifulSoup that fetches and prints the product name, price, and description from an online web store.
  assert create_web_scraper('http://web-store.com')==None
output: def create_web_scraper(url):
      import requests
      from bs4 import BeautifulSoup
      
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      
      products = soup.find_all('div', class_='product')
      
      for product in products:
          name = product.find('h2', class_='product-name').text
          price = product.find('span', class_='product-price').text
          description = product.find('p', class_='product-description').text
          
          print(f"Product Name: {name}")
          print(f"Price: {price}")
          print(f"Description: {description}")
      
      return None