ImportError: cannot import name 'cached_path'

ub16c9@ub16c9-gpu:/media/ub16c9/fcd84300-9270-4bbd-896a-5e04e79203b7/ub16_prj/naacl_transfer_learning_tutorial$ python3.6 pretraining_train.py
Traceback (most recent call last):
File "pretraining_train.py", line 21, in
from utils import get_and_tokenize_dataset, average_distributed_scalar, add_logging_and_checkpoint_saving, WEIGHTS_NAME
File "/media/ub16c9/fcd84300-9270-4bbd-896a-5e04e79203b7/ub16_prj/naacl_transfer_learning_tutorial/utils.py", line 16, in
from pytorch_pretrained_bert import cached_path
ImportError: cannot import name 'cached_path'

Run python3.6 pretraining_train.py and inspect utils.py line 16, along with the installed pytorch_pretrained_bert package, to determine why cached_path cannot be imported. Done means the tutorial starts past this import error.

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