parameters: (lst)
return_statement: return u.keys()
docstring: remove_duplicates([2,2,2,1,3,3]) => [3,1,2]
  
      Returns a copy of a list without duplicates. Every list
      item must be hashable and the order of the items in the
      resulting list is not defined.
docstring_summary: remove_duplicates([2,2,2,1,3,3]) => [3,1,2]
docstring_tokens: remove_duplicates ( [ 2 2 2 1 3 3 ] ) = > [ 3 1 2 ]
function: def remove_duplicates(lst):
      """remove_duplicates([2,2,2,1,3,3]) => [3,1,2]
  
      Returns a copy of a list without duplicates. Every list
      item must be hashable and the order of the items in the
      resulting list is not defined.
      """
      u = {}
      for x in lst:
          u[x] = 1
  
      return u.keys()
function_tokens: def remove_duplicates ( lst ) : u = { } for x in lst : u [ x ] = 1 return u . keys ( )