检验tensorflow-gpu安装成功

要检验tensorflow-gpu是否成功安装，可以使用以下代码进行验证：

import tensorflow as tf
gpu_available = tf.test.is_gpu_available()
print("GPU available:", gpu_available)

这段代码会输出是否有可用的GPU。如果输出为True，则表示tensorflow-gpu安装成功并且可以使用GPU进行计算。如果输出为False，则表示tensorflow-gpu没有成功安装或者没有可用的GPU。
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