在学习chapter_3运行train_image_classifier.py时，出现以下问题： InvalidArgumentError: Cannot assign a device for operation ‘InceptionV3/Conv2d_1a_3x3/weights/Initializer/truncated_normal/TruncatedNormal’: Could not satisfy explicit device specification ‘’ because the node was colocated with a group of nodes that required incompatible device ‘/device0’ 恳请老师帮忙解答，谢谢
老师，第五章检查Tensorflow object detection API时出现错误 no module named ‘nets’
老师，第五章检查Tensorflow object detection API时出现错误 no module named ‘nets’
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在学习chapter_3运行train_image_classifier.py时，出现以下问题：
0’
InvalidArgumentError: Cannot assign a device for operation ‘InceptionV3/Conv2d_1a_3x3/weights/Initializer/truncated_normal/TruncatedNormal’: Could not satisfy explicit device specification ‘’ because the node was colocated with a group of nodes that required incompatible device ‘/device
恳请老师帮忙解答，谢谢
运行第五章，5.2.3 train.py时，输出显示： raise ValueError(‘First step cannot be zero.’)
ValueError: First step cannot be zero.求助是什么原因？前面都说按照书里设置的，前面都没有出错。