TensorFlow的异常Reciprocal[T=DT_INT32](Variable_1/read)

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在TF里，使用32位整数来计算倒数时会抛出这个异常：

Traceback (most recent call last):
File "C:\python35\lib\site-packages\tensorflow\python\client\session.py", line 1022, in _do_call
return fn(*args)
File "C:\python35\lib\site-packages\tensorflow\python\client\session.py", line 1000, in _run_fn
self._extend_graph()
File "C:\python35\lib\site-packages\tensorflow\python\client\session.py", line 1049, in _extend_graph
self._session, graph_def.SerializeToString(), status)
File "C:\python35\lib\contextlib.py", line 66, in __exit__
next(self.gen)
File "C:\python35\lib\site-packages\tensorflow\python\framework\errors_impl.py", line 469, in raise_exception_on_not_ok_status
pywrap_tensorflow.TF_GetCode(status))
tensorflow.python.framework.errors_impl.InvalidArgumentError: No OpKernel was registered to support Op 'Reciprocal' with these attrs. Registered devices: [CPU,GPU], Registered kernels:
device='CPU'; T in [DT_FLOAT]
device='CPU'; T in [DT_HALF]
device='CPU'; T in [DT_DOUBLE]
device='CPU'; T in [DT_COMPLEX64]
device='CPU'; T in [DT_COMPLEX128]
device='GPU'; T in [DT_FLOAT]
device='GPU'; T in [DT_HALF]
device='GPU'; T in [DT_DOUBLE]
device='GPU'; T in [DT_INT64]

[[Node: Reciprocal = Reciprocal[T=DT_INT32](Variable_1/read)]]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "D:\work\csdn\TF_API\src\TFAPI_6\TFAPI_6\TFAPI_17.py", line 31, in <module>
demo.run_graph()
File "D:\work\csdn\TF_API\src\TFAPI_6\TFAPI_6\TFAPI_17.py", line 21, in run_graph
sess.run(init)
File "C:\python35\lib\site-packages\tensorflow\python\client\session.py", line 767, in run
run_metadata_ptr)
File "C:\python35\lib\site-packages\tensorflow\python\client\session.py", line 965, in _run
feed_dict_string, options, run_metadata)
File "C:\python35\lib\site-packages\tensorflow\python\client\session.py", line 1015, in _do_run
target_list, options, run_metadata)
File "C:\python35\lib\site-packages\tensorflow\python\client\session.py", line 1035, in _do_call
raise type(e)(node_def, op, message)
tensorflow.python.framework.errors_impl.InvalidArgumentError: No OpKernel was registered to support Op 'Reciprocal' with these attrs. Registered devices: [CPU,GPU], Registered kernels:
device='CPU'; T in [DT_FLOAT]
device='CPU'; T in [DT_HALF]
device='CPU'; T in [DT_DOUBLE]
device='CPU'; T in [DT_COMPLEX64]
device='CPU'; T in [DT_COMPLEX128]
device='GPU'; T in [DT_FLOAT]
device='GPU'; T in [DT_HALF]
device='GPU'; T in [DT_DOUBLE]
device='GPU'; T in [DT_INT64]

[[Node: Reciprocal = Reciprocal[T=DT_INT32](Variable_1/read)]]

Caused by op 'Reciprocal', defined at:
File "<string>", line 1, in <module>
File "C:\python35\lib\idlelib\run.py", line 130, in main
ret = method(*args, **kwargs)
File "C:\python35\lib\idlelib\run.py", line 357, in runcode
exec(code, self.locals)
File "D:\work\csdn\TF_API\src\TFAPI_6\TFAPI_6\TFAPI_17.py", line 30, in <module>
demo = DemoTF()
File "D:\work\csdn\TF_API\src\TFAPI_6\TFAPI_6\TFAPI_17.py", line 16, in __init__
self.reciprocal = tf.reciprocal(self.num2)
File "C:\python35\lib\site-packages\tensorflow\python\ops\gen_math_ops.py", line 1964, in reciprocal
result = _op_def_lib.apply_op("Reciprocal", x=x, name=name)
File "C:\python35\lib\site-packages\tensorflow\python\framework\op_def_library.py", line 763, in apply_op
op_def=op_def)
File "C:\python35\lib\site-packages\tensorflow\python\framework\ops.py", line 2395, in create_op
original_op=self._default_original_op, op_def=op_def)
File "C:\python35\lib\site-packages\tensorflow\python\framework\ops.py", line 1264, in __init__
self._traceback = _extract_stack()

InvalidArgumentError (see above for traceback): No OpKernel was registered to support Op 'Reciprocal' with these attrs. Registered devices: [CPU,GPU], Registered kernels:
device='CPU'; T in [DT_FLOAT]
device='CPU'; T in [DT_HALF]
device='CPU'; T in [DT_DOUBLE]
device='CPU'; T in [DT_COMPLEX64]
device='CPU'; T in [DT_COMPLEX128]
device='GPU'; T in [DT_FLOAT]
device='GPU'; T in [DT_HALF]
device='GPU'; T in [DT_DOUBLE]
device='GPU'; T in [DT_INT64]

[[Node: Reciprocal = Reciprocal[T=DT_INT32](Variable_1/read)]]

从异常信息上来看，它是不支持tf.int32的类型运算的，所以抛出异常。只支持下面的类型：

device='CPU'; T in [DT_FLOAT]
device='CPU'; T in [DT_HALF]
device='CPU'; T in [DT_DOUBLE]
device='CPU'; T in [DT_COMPLEX64]
device='CPU'; T in [DT_COMPLEX128]
device='GPU'; T in [DT_FLOAT]
device='GPU'; T in [DT_HALF]
device='GPU'; T in [DT_DOUBLE]
device='GPU'; T in [DT_INT64]

代码如下：

#python 3.5.3/TensorFlow 1.0/win 10    #2017-04-01 蔡军生  http://blog.csdn.net/caimouse    ##导入要使用的库import tensorflow as tfimport numpy as np#演示API的类class DemoTF:    def __init__(self):        '''构造函数'''        self.num1 = tf.Variable([1, -2, -3], dtype = tf.int32)        self.num2 = tf.Variable([4, 5, -6], dtype = tf.int32)                self.sign = tf.sign(self.num1)        self.reciprocal = tf.reciprocal(self.num2)            def run_graph(self):               init = tf.global_variables_initializer()  # 初始化变量        with tf.Session() as sess:                        sess.run(init)            self.main(sess) #运行主函数    def main(self, sess):        '''主函数'''        print(sess.run(self.sign))         print(sess.run(self.reciprocal))                 #主程序入口if __name__ == "__main__":    demo = DemoTF()    demo.run_graph()

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