python - Keras LSTM 尝试创建模型架构的多个错误
问题描述
这是我今天早些时候发布的一个重复问题,在另一个问题中我使用的是旧版本的 Keras。我已经升级到 Keras 2.0.0,但仍然遇到很多我自己无法弄清楚的错误,所以我主要逐字逐句地重新发布这个问题。
我正在尝试了解如何使用 keras 进行供应链预测,但我不断收到在其他地方找不到帮助的错误。我试过做类似的教程;太阳黑子预测教程、污染多元教程等,但我仍然不了解 input_shape 参数的工作原理或如何组织我的数据以使其被 keras 接受。
我的数据集是一个时间序列,描述了我们每个月销售的产品数量。我把那个单一的时间序列,107 个月,变成了一个 30 行,77 列的数据集。我从中创建了一个训练集和测试集。
从命令提示符:
Successfully uninstalled Keras-1.2.0
Successfully installed keras-2.0.0
Python Version: 3.5.4
这是我得到的代码和相应的错误。
model = Sequential()
model.add(LSTM(input_shape=(77, 1), output_dim = 10))
追溯
C:\Python35\lib\site-packages\keras\backend\tensorflow_backend.py in concatenate(tensors, axis)
1219 A tensor.
-> 1220 """
1221 zero = _to_tensor(0., x.dtype.base_dtype)
AttributeError: module 'tensorflow' has no attribute 'concat_v2'
During handling of the above exception, another exception occurred:
TypeError Traceback (most recent call last)
<ipython-input-42-ee393fff874d> in <module>()
1 model = Sequential()
----> 2 model.add(LSTM(input_shape=(77, 1), output_dim = 10))
3 #model.add(Dense(10, activation = 'relu'))
4 #model.add(Dense(1, activation = 'softmax'))
C:\Python35\lib\site-packages\keras\models.py in add(self, layer)
292 '`Sequential.from_config(config)`?')
293 return layer_module.deserialize(config, custom_objects=custom_objects)
--> 294
295
296 def model_from_yaml(yaml_string, custom_objects=None):
C:\Python35\lib\site-packages\keras\engine\topology.py in create_input_layer(self, batch_input_shape, input_dtype, name)
396
397 # Check ndim.
--> 398 if spec.ndim is not None:
399 if K.ndim(x) != spec.ndim:
400 raise ValueError('Input ' + str(input_index) +
C:\Python35\lib\site-packages\keras\engine\topology.py in __call__(self, x, mask)
541 # Handle automatic shape inference (only useful for Theano).
542 input_shape = _collect_input_shape(inputs)
--> 543
544 # Actually call the layer, collecting output(s), mask(s), and shape(s).
545 output = self.call(inputs, **kwargs)
C:\Python35\lib\site-packages\keras\layers\recurrent.py in build(self, input_shape)
761 constants.append(dp_mask)
762 else:
--> 763 constants.append([K.cast_to_floatx(1.) for _ in range(3)])
764
765 if 0 < self.recurrent_dropout < 1:
C:\Python35\lib\site-packages\keras\backend\tensorflow_backend.py in concatenate(tensors, axis)
1220 """
1221 zero = _to_tensor(0., x.dtype.base_dtype)
-> 1222 inf = _to_tensor(np.inf, x.dtype.base_dtype)
1223 x = tf.clip_by_value(x, zero, inf)
1224 return tf.sqrt(x)
C:\Python35\lib\site-packages\tensorflow\python\ops\array_ops.py in concat(values, axis, name)
1041 ops.convert_to_tensor(axis,
1042 name="concat_dim",
-> 1043 dtype=dtypes.int32).get_shape(
1044 ).assert_is_compatible_with(tensor_shape.scalar())
1045 return identity(values[0], name=scope)
C:\Python35\lib\site-packages\tensorflow\python\framework\ops.py in convert_to_tensor(value, dtype, name, preferred_dtype)
674 name=name,
675 preferred_dtype=preferred_dtype,
--> 676 as_ref=False)
677
678
C:\Python35\lib\site-packages\tensorflow\python\framework\ops.py in internal_convert_to_tensor(value, dtype, name, as_ref, preferred_dtype)
739
740 if ret is None:
--> 741 ret = conversion_func(value, dtype=dtype, name=name, as_ref=as_ref)
742
743 if ret is NotImplemented:
C:\Python35\lib\site-packages\tensorflow\python\framework\constant_op.py in _constant_tensor_conversion_function(v, dtype, name, as_ref)
111 as_ref=False):
112 _ = as_ref
--> 113 return constant(v, dtype=dtype, name=name)
114
115
C:\Python35\lib\site-packages\tensorflow\python\framework\constant_op.py in constant(value, dtype, shape, name, verify_shape)
100 tensor_value = attr_value_pb2.AttrValue()
101 tensor_value.tensor.CopyFrom(
--> 102 tensor_util.make_tensor_proto(value, dtype=dtype, shape=shape, verify_shape=verify_shape))
103 dtype_value = attr_value_pb2.AttrValue(type=tensor_value.tensor.dtype)
104 const_tensor = g.create_op(
C:\Python35\lib\site-packages\tensorflow\python\framework\tensor_util.py in make_tensor_proto(values, dtype, shape, verify_shape)
372 nparray = np.empty(shape, dtype=np_dt)
373 else:
--> 374 _AssertCompatible(values, dtype)
375 nparray = np.array(values, dtype=np_dt)
376 # check to them.
C:\Python35\lib\site-packages\tensorflow\python\framework\tensor_util.py in _AssertCompatible(values, dtype)
300 else:
301 raise TypeError("Expected %s, got %s of type '%s' instead." %
--> 302 (dtype.name, repr(mismatch), type(mismatch).__name__))
303
304
TypeError: Expected int32, got <tf.Variable 'lstm_7_W_i:0' shape=(1, 10) dtype=float32_ref> of type 'Variable' instead.
解决方案
我认为问题出在TF版本上。Keras 和 TF 之间的版本兼容性可能是任何人都面临的问题,因为 TF API 在很短的时间内发生了很大的变化。
我认为对于 Keras 2.2.X,您需要 TF 版本 > 1.10.X
尝试更新它,看看问题是否解决!