I have a function 'im_crop' in step function ,it generates  labels online 
,but it doesnot need to calculate grad,how can I do ?

在 2016年9月15日星期四 UTC+8下午9:11:44,nouiz写道:
>
> Can you give the full error with stack trace? If Theano give this error it 
> is probably because there is a path in the grad that request it. 
>
> Le 14 sept. 2016 04:14, <shey...@gmail.com <javascript:>> a écrit :
>
>> But my function does not need to calculate gradient,how can I fix this?
>>
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