code: def from_yamlfile(cls, fp, selector_handler=None, strict=False, debug=False):
          
  
          return cls.from_yamlstring(fp.read(), selector_handler=selector_handler, strict=strict, debug=debug)
docs: Create a Parselet instance from a file containing
          the Parsley script as a YAML object
  
          >>> import parslepy
          >>> with open('parselet.yml') as fp:
          ...     parslepy.Parselet.from_yamlfile(fp)
          ...
          <parslepy.base.Parselet object at 0x2014e50>
  
          :param file fp: an open file-like pointer containing the Parsley script
          :rtype: :class:`.Parselet`
  
          Other arguments: same as for :class:`.Parselet` contructor