when i write this code 

elif val > mVal and val < totalVal: 

 warning = { 

 'title': _('Warning.'), 

 'message': _('You are Between ThreshHold Value.')} 

 return {'warning': warning}

if i remove this code its working well .....

its show me error like this 

File "/home/usman/Documents/odoo12/odoo/addons/web/controllers/main.py", line 954, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/home/usman/Documents/odoo12/odoo/odoo/api.py", line 747, in call_kw
    return _call_kw_model_create(method, model, args, kwargs)
  File "/home/usman/Documents/odoo12/odoo/odoo/api.py", line 728, in _call_kw_model_create
    return result.id if isinstance(args[0], Mapping) else result.ids
AttributeError: 'dict' object has no attribute 'id'