code: def unique_list(l):
      """Uniquify a list (skip duplicate items)."""
      result = []
      for x in l:
          if x not in result:
              result.append(x)
      return result
  
imports: from collections import namedtuple
  from hashlib import sha256
  import os
  import shutil
  import sys
  import fnmatch
  from sympy.testing.pytest import XFAIL
label_desc: Use image node_id 12 for calling a global function with example usage: unique_list(l) and returns: result