<p>There are 3 trees that offer dream services.</p> <p>Which tree do you prefer to dream with?</p> <p>Please choose one:</p> <form method="POST" action="/generate"> <input type="hidden" name="location" value="{{ location }}" /> <ul> {% for tree in trees %} <li><input type="radio" name="tree" value="{{ loop.index0 }}"> {{ tree }}</li> {% endfor %} </ul> <input type="submit" value="Generate dreams"/> </form>