docs: def from_file(cls, db_file=ALL_SETS_PATH):
          """Reads card data from a JSON-file.
  
          :param db_file: A file-like object or a path.
          :return: A new :class:`~mtgjson.CardDb` instance.
          """
          if callable(getattr(db_file, 'read', None)):
              return cls(json.load(db_file))
  
          with io.open(db_file, encoding='utf8') as inp:
              return cls(json.load(inp))