No module named 'doc_scanner'

[crapthings]

hello ，我最近刚研究py和这个图形处理，想看看这个怎么用提示这个

python3 scripts/scan_demo.py
Traceback (most recent call last):
  File "scripts/scan_demo.py", line 6, in <module>
    from doc_scanner import scanner
ModuleNotFoundError: No module named 'doc_scanner'

[crapthings]

演示结果大概长这样。

git clone --depth 1 https://github.com/Guoli-Lyu/document-scanner
cd document-scanner
pip3 install -r requirements.txt
python3 setup.py install
python3 scripts/scan_demo.py --show mpl