text: import sys
  import os
  
  
  def main():
  
      if len(sys.argv) == 1:
          print(f"Missing required required arguments. \nusage: py compare_lists.py <file one> <file two>")
          return
  
      if len(sys.argv) == 2:
          print(f"Missing a second argument for the second file name.\nusage: py compare_lists.py <file one> <file two>")
          return
      
      lines1 = set()
      lines2 = set()
  
      if not os.path.exists(sys.argv[1]):
          print(f"File Argument 1 <<{sys.argv[1]}>> does not exist.")
          return
  
      if not os.path.exists(sys.argv[2]):
          print(f"File Argument 2 <<{sys.argv[2]}>> does not exist.")
          return
  
      with open(sys.argv[1]) as f1:
          with open(sys.argv[2]) as f2:
              lines1 = {x.strip() for x in set(f1.readlines())}
              lines2 = {x.strip() for x in set(f2.readlines())}
  
      print(f"# lines in file 1: {len(lines1)}")
      print(f"# lines in file 2: {len(lines2)}")
  
      repeated = {x for x in lines1 if x in lines2}
  
      print(f"Num repeated: {len(repeated)}")
      # print(f"Repeated: {repeated}")
  
      print(f"Lines in file 1, but not in file 2:\n{lines1-lines2}")
      print(f"Lines in file 2, but not in file 1:\n{lines2-lines1}")
  
  if __name__ == "__main__":
      main()
  