def pop(self, key, default=__marker):
      try:
        value = self[key]
      except __HOLE__:
        if default is self.__marker:
          raise
        return default
      else:
        del self[key]
        return value
dataset/ETHPy150Open sklearn-theano/sklearn-theano/sklearn_theano/externals/google/protobuf/internal/containers.py/MutableMapping.pop