code: def from_file(cls, path, fields=None, encoding='utf-8'):
          
          path = _table_filename(path)  # do early in case file not found
          if fields is None:
              fields = _get_relation_from_table_path(path)
  
          table = cls(fields)
          table.attach(path, encoding=encoding)
  
          return table
docs: Instantiate a Table from a database file.
  
          This method instantiates a table attached to the file at *path*.
          The file will be opened and traversed to determine the number of
          records, but the contents will not be stored in memory unless
          they are modified.
  
          Args:
              path: the path to the table file
              fields: the Relation schema for the table (loaded from the
                  relations file in the same directory if not given)
              encoding: the character encoding of the file at *path*