old_contents: import os
  from datetime import date
  
  from pyramid.response import FileResponse
  from pyramid.view import view_config
  
  
  @view_config(route_name='home', renderer='templates/index.html')
  def index(request):
      return {'year': date.today().year}
  
  
  @view_config(route_name='robots')
  def robots(request):
      here = os.path.abspath(os.path.dirname(__file__))
      response = FileResponse(here + '/../static/robots.txt', request=request)
      return response
  
new_contents: import os
  from datetime import date
  
  from pyramid.httpexceptions import HTTPBadRequest
  from pyramid.response import FileResponse
  from pyramid.view import view_config
  from sqlalchemy.exc import IntegrityError
  
  
  @view_config(route_name='home', renderer='templates/index.html')
  def index(request):
      return {'year': date.today().year}
  
  
  @view_config(route_name='robots')
  def robots(request):
      here = os.path.abspath(os.path.dirname(__file__))
      response = FileResponse(here + '/../static/robots.txt', request=request)
      return response
  
  
  @view_config(context=IntegrityError)
  def bad_request(exc, request):
      raise HTTPBadRequest()
  
subject: Throw 500 error on SQLAlchemy integrity error