<filename>Chapter16/cf_rfem_hist_price/venv/lib/python3.6/io.py
/home/wai/anaconda3/lib/python3.6/io.py
<filename>Chapter16/cf_rfem_hist_price/venv/lib/python3.6/io.py
/home/wai/anaconda3/lib/python3.6/io.py