code: def get_wells(self, uwis=None):
          
          if uwis is None:
              return Project(self.__list)
          return Project([w for w in self if w.uwi in uwis])
docs: Returns a new Project with only the wells named by UWI.
  
          Args:
              uwis (list): list or tuple of UWI strings.
          
          Returns:
              project.