First, we extract the list of unique genres in the dataset:

In $[20]$: all$\_$genres $=[]$

In $[21]$: for x in movies.genres: all$\_$genres.extend$($x$.$split$(\text{'}|\text{'}))$

In $[22]$: genres $=$ pd$.$unique$($all$\_$genres$)$

In $[23]$: genres