请问我这个错误是怎么回事，找了好久还是解决不了

[gonggtao]

2019-04-22 10:46:08.222826: W tensorflow/core/framework/op_kernel.cc:1401] OP_REQUIRES failed at ctc_loss_op.cc:168 : Invalid argument: Saw a non-null label (index >= num_classes - 1) following a null label, batch: 0 num_classes: 10 labels: 1
Traceback (most recent call last):
File "E:/Python/HandChracterRecognition/HandChracterRecognition.py", line 97, in
train()
File "E:/Python/HandChracterRecognition/HandChracterRecognition.py", line 91, in train
verbose = 1)
File "E:\Python Edition\lib\site-packages\keras\engine\training.py", line 1039, in fit
validation_steps=validation_steps)
File "E:\Python Edition\lib\site-packages\keras\engine\training_arrays.py", line 199, in fit_loop
outs = f(ins_batch)
File "E:\Python Edition\lib\site-packages\keras\backend\tensorflow_backend.py", line 2715, in call
return self._call(inputs)
File "E:\Python Edition\lib\site-packages\keras\backend\tensorflow_backend.py", line 2675, in _call
fetched = self._callable_fn(*array_vals)
File "E:\Python Edition\lib\site-packages\tensorflow\python\client\session.py", line 1439, in call
run_metadata_ptr)
File "E:\Python Edition\lib\site-packages\tensorflow\python\framework\errors_impl.py", line 528, in exit
c_api.TF_GetCode(self.status.status))
tensorflow.python.framework.errors_impl.InvalidArgumentError: Saw a non-null label (index >= num_classes - 1) following a null label, batch: 0 num_classes: 10 labels: 1
[[{{node ctc/CTCLoss}}]]

我使用的是lstm代码，用于识别数字验证码，因此char_set = '0123456789'，训练的图片是用四位数字验证码，求解决

[gonggtao]

@YIYIMZ 十分感谢，你写的ctc代码非常简洁明了，对我这个初学者帮助很大！

[un-human]

@YIYIMZ 十分感谢，你写的ctc代码非常简洁明了，对我这个初学者帮助很大！

2019-04-22 10:46:08.222826: W tensorflow/core/framework/op_kernel.cc:1401] OP_REQUIRES failed at ctc_loss_op.cc:168 : Invalid argument: Saw a non-null label (index >= num_classes - 1) following a null label, batch: 0 num_classes: 10 labels: 1
Traceback (most recent call last):
File "E:/Python/HandChracterRecognition/HandChracterRecognition.py", line 97, in
train()
File "E:/Python/HandChracterRecognition/HandChracterRecognition.py", line 91, in train
verbose = 1)
File "E:\Python Edition\lib\site-packages\keras\engine\training.py", line 1039, in fit
validation_steps=validation_steps)
File "E:\Python Edition\lib\site-packages\keras\engine\training_arrays.py", line 199, in fit_loop
outs = f(ins_batch)
File "E:\Python Edition\lib\site-packages\keras\backend\tensorflow_backend.py", line 2715, in call
return self._call(inputs)
File "E:\Python Edition\lib\site-packages\keras\backend\tensorflow_backend.py", line 2675, in _call
fetched = self._callable_fn(*array_vals)
File "E:\Python Edition\lib\site-packages\tensorflow\python\client\session.py", line 1439, in call
run_metadata_ptr)
File "E:\Python Edition\lib\site-packages\tensorflow\python\framework\errors_impl.py", line 528, in exit
c_api.TF_GetCode(self.status.status))
tensorflow.python.framework.errors_impl.InvalidArgumentError: Saw a non-null label (index >= num_classes - 1) following a null label, batch: 0 num_classes: 10 labels: 1
[[{{node ctc/CTCLoss}}]]

我使用的是lstm代码，用于识别数字验证码，因此char_set = '0123456789'，训练的图片是用四位数字验证码，求解决

你知道 主函数入口在哪麽？