在tensorflow 2.0中使用TPU的語法 === ``` tf.config.experimental_connect_to_host('grpc://' + os.environ['COLAB_TPU_ADDR']) resolver = tf.distribute.cluster_resolver.TPUClusterResolver('grpc://' + os.environ['COLAB_TPU_ADDR']) tf.tpu.experimental.initialize_tpu_system(resolver) strategy = tf.distribute.experimental.TPUStrategy(resolver) ```