我正在研究TensorFlow上的项目,并且正在尝试使用线性回归器训练模型.要将数据添加到估算器上,我正在使用函数tf.estimator.inputs.pandas_input_fn(),但由于存在一些问题,因此无法启动训练.我收到此错误：

TypeError: Failed to convert object of type <class 'dict'> to Tensor. Contents: {'DispositionSoldAmount': <tf.Tensor 'random_shuffle_queue_DequeueMany:4' shape=(128,) dtype=float64>}. Consider casting elements to a supported type.

我试图将yData更改为pandas.core.series.Series,但这并没有改变结果.

有人有解决我问题的解决方案吗？

另外,我使用sklearn.linear_regression用相同的DataSet训练了另一个模型,并且该模型可以正常工作.

这是我的代码：

FEATURES = ["DispositionMileage","PurchasePrice","Age"] # X

feature_cols = [tf.feature_column.numeric_column(k) for k in FEATURES]

estimator = tf.estimator.LinearRegressor(feature_columns=feature_cols,model_dir="train")

def get_input_fn( num_epochs=None,n_batch = 128,shuffle=True):
         return tf.estimator.inputs.pandas_input_fn(
            x=Xdata,y=ydata,batch_size=n_batch,num_epochs=num_epochs,shuffle=shuffle)               

estimator.train(input_fn=get_input_fn(num_epochs=None,shuffle=True),steps=1000)

使用的数据：

Xdata type is pandas.core.frame.DataFrame:

        DispositionMileage  PurchasePrice  Age
9741                  3849        16472.0    0
9744                  3849        16472.0    0
9745                  3849        16472.0    0
9748                  3849        16472.0    0
                  ...
[18105 rows x 3 columns]



ydata type is pandas.core.frame.DataFrame:

        DispositionSoldAmount
9741                   1650.0
9744                   1650.0
9745                   1650.0
9748                   1650.0
13465                  7750.0
                  ...
[18105 rows x 1 columns]

完整的回溯：

WARNING:tensorflow:From /home/USER/.local/lib/python3.6/site-packages/tensorflow/python/estimator/inputs/queues/Feeding_queue_runner.py:62: QueueRunner.__init__ (from tensorflow.python.training.queue_runner_impl) is deprecated and will be removed in a future version.
Instructions for updating:
To construct input pipelines,use the `tf.data` module.
WARNING:tensorflow:From /home/USER/.local/lib/python3.6/site-packages/tensorflow/python/estimator/inputs/queues/Feeding_functions.py:500: add_queue_runner (from tensorflow.python.training.queue_runner_impl) is deprecated and will be removed in a future version.
Instructions for updating:
To construct input pipelines,use the `tf.data` module.
Traceback (most recent call last):
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/framework/tensor_util.py",line 527,in make_tensor_proto
    str_values = [compat.as_bytes(x) for x in proto_values]
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/framework/tensor_util.py",in <listcomp>
    str_values = [compat.as_bytes(x) for x in proto_values]
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/util/compat.py",line 61,in as_bytes
    (bytes_or_text,))
TypeError: Expected binary or unicode string,got {'DispositionSoldAmount': <tf.Tensor 'random_shuffle_queue_DequeueMany:4' shape=(128,) dtype=float64>}

During handling of the above exception,another exception occurred:

Traceback (most recent call last):
  File "tuto.py",line 85,in <module>
    estimator.train(input_fn=get_input_fn(num_epochs=None,steps=1000)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/estimator/estimator.py",line 354,in train
    loss = self._train_model(input_fn,hooks,saving_listeners)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/estimator/estimator.py",line 1207,in _train_model
    return self._train_model_default(input_fn,line 1237,in _train_model_default
    features,labels,model_fn_lib.ModeKeys.TRAIN,self.config)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/estimator/estimator.py",line 1195,in _call_model_fn
    model_fn_results = self._model_fn(features=features,**kwargs)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/estimator/canned/linear.py",line 537,in _model_fn
    sparse_combiner=sparse_combiner)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/estimator/canned/linear.py",line 215,in _linear_model_fn
    logits=logits)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/estimator/canned/head.py",line 239,in create_estimator_spec
    regularization_losses))
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/estimator/canned/head.py",line 1482,in _create_tpu_estimator_spec
    features=features,mode=mode,logits=logits,labels=labels)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/estimator/canned/head.py",line 1381,in create_loss
    expected_labels_dimension=self._logits_dimension)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/estimator/canned/head.py",line 305,in _check_dense_labels_match_logits_and_reshape
    labels = sparse_tensor.convert_to_tensor_or_sparse_tensor(labels)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/framework/sparse_tensor.py",line 279,in convert_to_tensor_or_sparse_tensor
    value,dtype=dtype,name=name)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/framework/ops.py",line 1146,in internal_convert_to_tensor
    ret = conversion_func(value,name=name,as_ref=as_ref)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/framework/constant_op.py",line 229,in _constant_tensor_conversion_function
    return constant(v,name=name)
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/framework/constant_op.py",line 208,in constant
    value,shape=shape,verify_shape=verify_shape))
  File "/home/USER/.local/lib/python3.6/site-packages/tensorflow/python/framework/tensor_util.py",line 531,in make_tensor_proto
    "supported type." % (type(values),values))
TypeError: Failed to convert object of type <class 'dict'> to Tensor. Contents: {'DispositionSoldAmount': <tf.Tensor 'random_shuffle_queue_DequeueMany:4' shape=(128,) dtype=float64>}. Consider casting elements to a supported type.