Could you give a more detailed example？

[ChinaWangYC]

I am very interested in your work，and I want to train a model use this. When I run
python -m chm.train
it can show me the usage. But, when I run
python -m chm.train ~/Path/to/model ~/Path/to/trainImages/image.png ~/Path/to/trainLabels/image.png
a ValueError occurred "ValueError: Unable to open ~/Path/to/trainImages/image.png' with given options". I have installed the libraries including 'zlib', so how should I solve this problem？