text: code_0 = 0
  code_1 = 1
  
  l_a = [
      code_0,
      code_1,
  ]
  
  code_a = "a"
  code_b = "b"
  
  l_b = [
      code_a,
      code_b,
  ]
  
  if __name__ == "__main__":
      for i in l_a:
          print(i)
      for i in l_b:
          print(i)
      # test for container membership
      if "a" in ["a", "b"]:
          print("OK")
  
  