Removing the same elements in a sorted sheet (list)

You can use the Itertools module:

   from  itertools  import  GroupByx = [ 'a' ,  'a' a ', ' a 'a'  'f' ,  'h' ,  'k' ,  'k' ] new_x = [el  for  el, _  in  in  Groupby (x)]   print  (New_x) # ['a' a 'f', 'h', 'k']      
 is better than an option with sett ITERTOOLS.Groupby retains the order in which the elements went in the original sequence. While SET does not guarantee preservation of order.