device:GPU:0 but available devices are [ /job:localhost/replica:0/task:0/dev

device:GPU:0 but available devices are [ /job:localhost/replica:0/task:0/dev

解决方法：

sess = tf.Session(config=tf.ConfigProto(allow_soft_placement=True, log_device_placement=True))

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原文链接：https://blog.csdn.net/jacke121/article/details/78568375