Adding tuple to list without using built-in append method

I want to add the tuple to a list without using built-in append method. My code is below:

def allPairs(x,y): 
     mylist = [] 
     for i in x: 
        for j in y: 
           if i!=j: 
              mylist.append((i,j)) 
     return mylist

Is there any alternate code for it to use in Python, that I can use in place of ‘append’ method?

>Solution :

[(i, j) for i in x for j in y if i != j]

Read about list comprehension