input: 
  from typing import List
  
  def generate_html_table_for_top_books(table_name: str, genre: str) -> str:
      """ Generate an HTML table displaying the top 10 bestselling books in a specific genre.
      >>> generate_html_table_for_top_books('Books', 'Fantasy')
      <table><tr><th>Title</th><th>Author</th><th>Genre</th><th>Sales</th></tr><tr><td>[Title 1]</td><td>[Author 1]</td><td>Fantasy</td><td>[Sales 1]</td></tr><tr><td>[Title 2]</td><td>[Author 2]</td><td>Fantasy</td><td>[Sales 2]</td></tr><tr><td>[Title 3]</td><td>[Author 3]</td><td>Fantasy</td><td>[Sales 3]</td></tr><tr><td>[Title 4]</td><td>[Author 4]</td><td>Fantasy</td><td>[Sales 4]</td></tr><tr><td>[Title 5]</td><td>[Author 5]</td><td>Fantasy</td><td>[Sales 5]</td></tr><tr><td>[Title 6]</td><td>[Author 6]</td><td>Fantasy</td><td>[Sales 6]</td></tr><tr><td>[Title 7]</td><td>[Author 7]</td><td>Fantasy</td><td>[Sales 7]</td></tr><tr><td>[Title 8]</td><td>[Author 8]</td><td>Fantasy</td><td>[Sales 8]</td></tr><tr><td>[Title 9]</td><td>[Author 9]</td><td>Fantasy</td><td>[Sales 9]</td></tr><tr><td>[Title 10]</td><td>[Author 10]</td><td>Fantasy</td><td>[Sales 10]</td></tr></table>
      """
  
output:     html = f"<table><tr><th>Title</th><th>Author</th><th>Genre</th><th>Sales</th></tr>"
      for i in range(1, 11):
          html += f"<tr><td>[Title {i}]</td><td>[Author {i}]</td><td>{genre}</td><td>[Sales {i}]</td></tr>"
      html += "</table>"
      return html