code: def use_json(self, *paths):
          
          for path in paths:
              if path:
                  fpath = os.path.expanduser(path)
                  if os.path.exists(fpath):
                      with open(fpath) as fh:
                          provider = DictProvider(json.load(fh), name=path)
                          self.add(provider)
docs: Args:
              *paths (str | unicode): Paths to files to add as static DictProvider-s, only existing files are added