'NoneType' object with constructor
I run the code below and often get 'NoneType' object. (I usually run multiprocessing)
```python
model = BertModel.from_pretrained('bert-base-uncased')
tokenizer = BertTokenizer.from_pretrained('bert-base-uncased')
```
Me too.It is probably Network connection problem.<|||||>The network connection check has been relaxed in the now merged #500.
It will be included in the next PyPI release (probably next week).
In the meantime you can install from `master`.<|||||>@thomwolf  Thank you.<|||||>The new release is on pypi!