code: def get_project_trend_graph_url(project, start, end):
      
  
      filename = get_project_trend_graph_filename(project, start, end)
      urls = {
          'graph_url': urlparse.urljoin(GRAPH_URL, filename + ".png"),
          'data_url': urlparse.urljoin(GRAPH_URL, filename + ".csv"),
      }
  
      return urls
docs: Generates a bar graph for a project.