Guys I need to resolve a very serious issue.
My aim is to print the value in computing fields for example if both warning rise then print both values in computing fields. I can print one warning in print but unable to print both value.
how can i Make list to print both value?    
 
 

@ api.onchange ( 'noo_brand_id' , 'brand_id' , 'customer_box_code' , 'noo_box_code' ,)
def compute_fields ( self ): 
    list = [ 'a' ] 
    if self .brand_id: 
        # brand = list 
if self .noon_brand_id! = self .brand_id:
brand = {'warning' : { 'title' :( 'warning' ), 'message' :( 'Brand is not machted' ),             }}         
list.append (brand)
return brand  
if self .customer_box_code: 
    if self .noon_box_code! = self .customer_box_code: 
        box = { 'warning' : { 
            'title' : ( 'warning' ), 
            'message' : ( 'box code is not matched' ), 
        }} 

        print (box [ 'warning' ] [ 'message' ]) 
    list.append (box) 
    print ( 'this print inside of the if' , list) 
     # self.warning_brand_id = box ['warning'] ['message'] 
return box    
print ( 'this print is outside of the if' , list)