ant difference between
          parsers and generators. While parsers may be used without 'producing' any
          data, generators always need data to generate the output from. We mentioned
          one way of passing data to the generator by supplying it as a parameter
          to one of the main API functions (for instance <code class="computeroutput"><span class="identifier">generate</span><span class="special">()</span></code> or <code class="computeroutput"><span class="identifier">generate_delimi