code: def add_to_pythonpath(self, path):
          
          pathlist = self.get_pythonpath()
          if path in pathlist:
              return False
          else:
              pathlist.insert(0, path)
              self.set_pythonpath(pathlist)
              return True
docs: Add path to project's PYTHONPATH
          Return True if path was added, False if it was already there