运行example时报错

[ZhouTaiji]

你好，我在运行example文件夹中的demo时，对同样的数据，使用model.fit训练与model.evaluate评估均无异常，但使用model.predict进行预测将会报如下的错：

`Traceback (most recent call last): File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/gen_array_ops.py", line 1172, in concat_v2 tld.op_callbacks, values, axis) tensorflow.python.eager.core._FallbackException: This function does not handle the case of the path where all inputs are not already EagerTensors.

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "/workspace/src/demo_tn.py", line 298, in train(Strategy) File "/workspace/src/demo_tn.py", line 255, in train score = model.predict(features) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/training.py", line 88, in _method_wrapper return method(self, *args, **kwargs) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/training.py", line 1285, in predict all_outputs = nest.map_structure_up_to(batch_outputs, concat, outputs) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/util/nest.py", line 1118, in map_structure_up_to **kwargs) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/util/nest.py", line 1214, in map_structure_with_tuple_paths_up_to *flat_value_lists)] File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/util/nest.py", line 1213, in results = [func(*args, **kwargs) for args in zip(flat_path_list, File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/util/nest.py", line 1116, in lambda _, *values: func(*values), # Discards the path arg. File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/keras/engine/training.py", line 1740, in concat return array_ops.concat(tensors, axis=axis) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/util/dispatch.py", line 180, in wrapper return target(*args, **kwargs) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/array_ops.py", line 1606, in concat return gen_array_ops.concat_v2(values=values, axis=axis, name=name) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/gen_array_ops.py", line 1177, in concat_v2 values, axis, name=name, ctx=_ctx) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/ops/gen_array_ops.py", line 1209, in concat_v2_eager_fallback _attr_T, values = _execute.args_to_matching_eager(list(values), ctx) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/eager/execute.py", line 263, in args_to_matching_eager t, dtype, preferred_dtype=default_dtype, ctx=ctx)) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/framework/ops.py", line 1341, in convert_to_tensor ret = conversion_func(value, dtype=dtype, name=name, as_ref=as_ref) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/framework/constant_op.py", line 321, in _constant_tensor_conversion_function return constant(v, dtype=dtype, name=name) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/framework/constant_op.py", line 262, in constant allow_broadcast=True) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/framework/constant_op.py", line 270, in _constant_impl t = convert_to_eager_tensor(value, ctx, dtype) File "/usr/local/lib/python3.6/dist-packages/tensorflow/python/framework/constant_op.py", line 96, in convert_to_eager_tensor return ops.EagerTensor(value, ctx.device_name, dtype) ValueError: Attempt to convert a value (None) with an unsupported type (<class 'NoneType'>) to a Tensor.`

我在docker中运行的程序，tf版本为2.2/2.3时均会出现此错误，将模型改为tf版本，其他不变也不会报错，我对example中代码未作出修改，只修改了config中的预测日期：

PREDICT_DT = '2020-05-12'

然后对main.py 81行处的代码进行修改，增加batch_size参数

dataset = read_dataset(C.DATA_DIR, [C.PREDICT_DT], C.FILE_MATCH_PATTERN, C.BATCH_SIZE, parse_line_batch)

请问这里报错是哪里有问题呢？

[zhangqianjin]

tensornet中 model/Model.py中 x, y, sample_weight = data_adapter.unpack_x_y_sample_weight(data) ，return部分代码需要修改，没有值不返回