title: Python re.sub remove only parenthesis
body: <p>I want to remove parenthesis in a sentence which can contain emoticone. For example, </p>
  
  <blockquote>
    <p>" this game is awesome but expensive($100) :("</p>
  </blockquote>
  
  <p>. How can I obtain this on python : </p>
  
  <blockquote>
    <p>"this game is awesome but expensive $100 :("</p>
  </blockquote>