problem with list

[darktitan]

Ok no i got a new problem with the code. when im use append to continue adding to the list it over writes it instead of adding new data. i tryed extend to getting the same problem.

this is how i wanted to print

test1-1-1-1
test1-1-2-2
test1-1-3-3
test2-2-1-1
test2-2-2-2
test2-2-3-3

instead i get the last added data when i print the list like this.

test2-2-1-1
test2-2-2-2
test2-2-3-3

this is my code so far.

    def funktion(self):
        value1 = (self.a1.get())
        value2 = (self.a2.get())
        value3 = (self.a3.get())
        value4 = (self.a4.get())
        value5 = (self.a5.get())
        self.mylist = []
        
        for parts in range(value3-1, value5):
            #print('{}-{}-{}-{}\n'.format(value1, value2, parts+1, parts+1))
            #self.text_entry.insert(END, '{}-{}-{}-{}\n'.format(value1, value2, parts+1, parts+1))
            self.mylist.append('{}-{}-{}-{}'.format(value1, value2, parts+1, parts+1))
        print ('\n'.join(self.mylist))

    def file_save(self):
        print ('\n'.join(self.mylist))