TPUからGoogle ColabのローカルFSには書き込めない
BERTのfine-tuningが少し走って死んだ:
エラーメッセージ: Unsuccessful TensorSliceReader constructor: Failed to get matching files on /content/gdrive/My Drive/bert-wiki-ja/model.ckpt-1400000: Unimplemented: File system scheme '[local]' not implemented
Local file system is not supported on TPU. You need to use Google Storage.