code: def from_yamlstring(cls, s, selector_handler=None, strict=False, debug=False):
          
  
          import yaml
          return cls(yaml.load(s), selector_handler=selector_handler, strict=strict, debug=debug)
docs: Create a Parselet instance from s (str) containing
          the Parsley script as YAML
  
          >>> import parslepy
          >>> parsley_string = '''---
              title: h1
              link: a @href
          '''
          >>> p = parslepy.Parselet.from_yamlstring(parsley_string)
          >>> type(p)
          <class 'parslepy.base.Parselet'>
          >>>
  
          :param string s: a Parsley script as a YAML string
          :rtype: :class:`.Parselet`
  
          Other arguments: same as for :class:`.Parselet` contructor