def popitem(self):
      try:
        key = next(iter(self))
      except __HOLE__:
        raise KeyError
      value = self[key]
      del self[key]
      return key, value
dataset/ETHPy150Open sklearn-theano/sklearn-theano/sklearn_theano/externals/google/protobuf/internal/containers.py/MutableMapping.popitem