def __init__(self, builder):
    if not isinstance(builder, Builder):
      raise yaml_errors.ListenerConfigurationError(
        'Must provide builder of type yaml_listener.Builder')
    self._builder = builder
    self._stack = None
    self._top = None
    self._results = []
Generates secret key for a request in RSS format
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/api/yaml_builder.py/BuilderHandler.__init__--crossover with--dataset/ETHPy150Open treeio/treeio/treeio/core/rss.py/get_secret_key