273   user = None  # assume that no User entity will be found

   273   user = None  # assume that no User entity will be found

   274 

   274 

   275   # try to fetch User entity corresponding to link_name if one exists

   275   # try to fetch User entity corresponding to link_name if one exists

   276   try:

   276   try:

   277     if link_name:

   277     if link_name:

   279   except out_of_band.ErrorResponse, error:

   279   except out_of_band.ErrorResponse, error:

   280     # show custom 404 page when link name doesn't exist in Datastore

   280     # show custom 404 page when link name doesn't exist in Datastore

   281     error.message = error.message + DEF_CREATE_NEW_USER_MSG

   281     error.message = error.message + DEF_CREATE_NEW_USER_MSG

   282     return simple.errorResponse(request, error, template, context)

   282     return simple.errorResponse(request, error, template, context)

   283 

   283