如何 save/load tensorflow hub 模块 to/from 自定义路径？

Question

tensorflow_hub 库维护者使用户可以轻松下载和使用预训练的 tensorflow 模块，例如：

import tensorflow_hub as hub

embed = hub.Module("https://tfhub.dev/google/universal-sentence-encoder/1")

但是从 sys.stderr 看来它是在本地将模块保存到一个临时目录，即

INFO:tensorflow:Using /var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules to cache modules. INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_0:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_0 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_1:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_1 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_10:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_10 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_11:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_11 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_12:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_12 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_13:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_13 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_14:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_14 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_15:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_15 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_16:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_16 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_2:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_2 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_3:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_3 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_4:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_4 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_5:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_5 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_6:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_6 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_7:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_7 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_8:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_8 INFO:tensorflow:Initialize variable module/Embeddings_en/sharded_9:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Embeddings_en/sharded_9 INFO:tensorflow:Initialize variable module/Encoder_en/DNN/ResidualHidden_0/weights:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Encoder_en/DNN/ResidualHidden_0/weights INFO:tensorflow:Initialize variable module/Encoder_en/DNN/ResidualHidden_1/weights:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Encoder_en/DNN/ResidualHidden_1/weights INFO:tensorflow:Initialize variable module/Encoder_en/DNN/ResidualHidden_2/weights:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Encoder_en/DNN/ResidualHidden_2/weights INFO:tensorflow:Initialize variable module/Encoder_en/DNN/ResidualHidden_3/projection:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Encoder_en/DNN/ResidualHidden_3/projection INFO:tensorflow:Initialize variable module/Encoder_en/DNN/ResidualHidden_3/weights:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with Encoder_en/DNN/ResidualHidden_3/weights INFO:tensorflow:Initialize variable module/SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_0/bias:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_0/bias INFO:tensorflow:Initialize variable module/SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_0/weights:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_0/weights INFO:tensorflow:Initialize variable module/SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_1/bias:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_1/bias INFO:tensorflow:Initialize variable module/SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_1/weights:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_1/weights INFO:tensorflow:Initialize variable module/SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_2/bias:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_2/bias INFO:tensorflow:Initialize variable module/SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_2/weights:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with SHARED_RANK_ANSWER/response_encoder_0/tanh_layer_2/weights INFO:tensorflow:Initialize variable module/SNLI/Classifier/LinearLayer/bias:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with SNLI/Classifier/LinearLayer/bias INFO:tensorflow:Initialize variable module/SNLI/Classifier/LinearLayer/weights:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with SNLI/Classifier/LinearLayer/weights INFO:tensorflow:Initialize variable module/SNLI/Classifier/tanh_layer_0/bias:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with SNLI/Classifier/tanh_layer_0/bias INFO:tensorflow:Initialize variable module/SNLI/Classifier/tanh_layer_0/weights:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with SNLI/Classifier/tanh_layer_0/weights INFO:tensorflow:Initialize variable module/global_step:0 from checkpoint b'/var/folders/j6/xczfl75n3sbfwpg4190gpb104vnlxt/T/tfhub_modules/c6f5954ffa065cdb2f2e604e740e8838bf21a2d3/variables/variables' with global_step

机器重新启动后，模块被删除，运行 hub.Module('...') 代码再次将重新下载模块。

是否可以将模块保存到自定义目录，然后从自定义目录加载？

如果可能的话，如何 save/load tensorflow hub 模块 to/from 自定义路径？

Answer 1

确实可以 specify/use 自定义目录 :) 有关说明，请参阅 https://www.tensorflow.org/hub/basics

中名为 "Caching Modules" 的部分

Answer 2

您可以从 url + '?tf-hub-format=compressed'

下载您需要的模型

我尝试下载 elmo 并且成功了

url = https://tfhub.dev/google/elmo/2 + '?tf-hub-format=compressed'

例如：https://tfhub.dev/google/elmo/2?tf-hub-format=compressed

模型将作为 tarfile 下载到您的计算机。

一旦你解压文件，它将有 tfhub_module.pb

Answer 3

对于那些仍在寻找答案的人，特别是 ELMO，正如@harikris 所说，您可以使用

url = https://tfhub.dev/google/elmo/2 + '?tf-hub-format=压缩'

下载模块的格式，例如this link

下载后，将内容解压到一个文件夹中，然后在 hub.Module 代码中只需将 URL 替换为目录路径，如

中所述

https://www.tensorflow.org/hub/basics

Answer 4

如果没有设置TFHUB_CACHE_DIR环境变量值，默认缓存目录为：

cache_dir = os.path.join(tempfile.gettempdir(), "tfhub_modules")

下载的hub就在里面。

Answer 5

• 取 URL 并将其更改为：

https://tfhub.dev/google/universal-sentence-encoder/1

收件人：

https://storage.googleapis.com/tfhub-modules/google/universal-sentence-encoder/1.tar.gz

• 使用 Curl 或浏览器下载。
• 提取到首选位置（例如/home/admin/embed/）
• 将您的代码更改为：

.

import tensorflow_hub as hub 
embed = hub.load('/home/admin/embed/')

Answer 6

1) 找到您的型号：例如https://tfhub.dev/google/imagenet/inception_v1/feature_vector/1

2)获取真实下载路径：

replace tfhub.dev with storage.googleapis.com/tfhub-modules and append .tar.gz as the suffix.

3) 准备缓存：

On some platforms, TF hub will log the cache directory, but some won’t. Specifying the cache location in the code is much more reliable. Just put the following code in your file before calling tfhub to do so.

os.environ["TFHUB_CACHE_DIR"] = '/tmp/tfhub'

参考：How to run TF hub locally without internet connection