code: def find_third_party_modules ():
      
      parent = os.path.dirname(os.path.dirname(__file__))
      third_party = os.path.join(parent, "third_party")
      if os.path.isdir(third_party):
          sys.path.append(os.path.join(third_party, "dnspython"))
docs: Find third party modules and add them to the python path.