text: import yaml
  
  
  def load_hparams(filename):
      stream = open(filename, 'r')
      docs = yaml.safe_load_all(stream)
      hparams_dict = dict()
      for doc in docs:
          for k, v in doc.items():
              hparams_dict[k] = v
      return hparams_dict
  
  def merge_dict(user, default):
      if isinstance(user, dict) and isinstance(default, dict):
          for k, v in default.items():
              if k not in user:
                  user[k] = v
              else:
                  user[k] = merge_dict(user[k], v)
      return user
  
  class Dotdict(dict):
      """
      a dictionary that supports dot notation 
      as well as dictionary access notation 
      usage: d = DotDict() or d = DotDict({'val1':'first'})
      set attributes: d.val2 = 'second' or d['val2'] = 'second'
      get attributes: d.val2 or d['val2']
      """
      __getattr__ = dict.__getitem__
      __setattr__ = dict.__setitem__
      __delattr__ = dict.__delitem__
  
      def __init__(self, dct=None):
          dct = dict() if not dct else dct
          for key, value in dct.items():
              if hasattr(value, 'keys'):
                  value = Dotdict(value)
              self[key] = value
  
  class HpsYaml(Dotdict):
      def __init__(self, yaml_file):
          super(Dotdict, self).__init__()
          hps = load_hparams(yaml_file)
          hp_dict = Dotdict(hps)
          for k, v in hp_dict.items():
              setattr(self, k, v)
  
      __getattr__ = Dotdict.__getitem__
      __setattr__ = Dotdict.__setitem__
      __delattr__ = Dotdict.__delitem__
      
  
  
  
  
  
  
  