ModuleNotFoundError: No module named '__main__.utils_summarization'; '__main__' is not a package
# 🐛 Bug

## Information

I am using ./examples/summarization/bertabs/

`python run_summarization.py \
    --documents_dir $data_dir\
    --summaries_output_dir$output_dir \
    --no_cuda true \
    --batch_size 4 \
    --min_length 50 \
    --max_length 200 \
    --beam_size 5 \
    --alpha 0.95 \
    --block_trigram true
`
returns 
`ModuleNotFoundError: No module named '__main__.utils_summarization'; '__main__' is not a package`

My environment
- `transformers` version: 2.8.0
- Platform: Darwin-18.7.0-x86_64-i386-64bit
- Python version: 3.7.3
- PyTorch version (GPU?): 1.1.0 (False)
- Tensorflow version (GPU?): 2.0.0-beta1 (False)
- Using GPU in script?: No
- Using distributed or parallel set-up in script?: No


Thank you!


closing the issue 
changed the from `.utils_summarization import ( `
to ` from utils_summarization import ( `
in run_summarization.py
and solved the issue 