title: Google Colab don't get the file from GCS Bucket
body: <p>I am trying to train a model from this <a href="https://github.com/stevezheng23/xlnet_extension_tf" rel="nofollow noreferrer">repo</a> with TPU which requires all input files and the model directory must use a cloud storage bucket.</p>
  <p>I did create a bucket and upload all the files of the model.</p>
  <p>But google colab cannot read the path of my bucket. This is the command I run the file:</p>
  <pre><code>!python run_coqa.py \
  --use_tpu=True \
  --tpu=TF_MASTER \ # 'grpc://'
  --spiece_model_file=/content/xlnet_extension_tf/model/xlnet_cased_L-24_H-1024_A-16/spiece.model \
  --model_config_path=gs://my_xlnet_2/xlnet_cased_L-24_H-1024_A-16/xlnet_config.json \
  --init_checkpoint=gs://my_xlnet_2/xlnet_cased_L-24_H-1024_A-16/xlnet_model.ckpt \
  --task_name=coqa \
  --random_seed=100 \
  --predict_tag=xxxxx \
  --data_dir=/content/xlnet_extension_tf/data \
  --output_dir=gs://my_xlnet_2/xlnet_output \
  --model_dir=gs://my_xlnet_2/xlnet_output \
  --export_dir=gs://my_xlnet_2/xlnet_output \
  ...
  </code></pre>
  <p>Then I got this error:</p>
  <pre><code>FileNotFoundError: [Errno 2] No such file or directory: 'gs://my_xlnet_2/xlnet_output'
  </code></pre>
  <p>I can upload file to my bucket with this command, <code>BUCKET_NAME = 'gs://my_xlnet_2'</code>:</p>
  <pre><code>!gsutil mv /content/xlnet_extension_tf/model/xlnet_cased_L-24_H-1024_A-16 $BUCKET_NAME
  </code></pre>
  <p>Do you guys know how to fix this?</p>