just give me the python code

this is just using the sort function so the function must be used something like

diff$\_$list.sort$()$

Goal: Learn to combine different list methods.

Assignment: Given the lists list$\_1$ and list$\_2,$ create a new sorted list consisting of all the elements of list$\_1$ that do not appear in list$\_2.$ Make sure that duplicate items only appear once. Assign this new list to diff$\_$list. Make sure to use the sort function.