Hi,
Sorry it took a while to clean up other parts.
Please download the content here and run reproduce_bug.py.
Uncomment/comment line 104 to see the bug.
Basically, the output of self.create_psv would change w/ or w/o the printing function.
Ideally, the output artifacts in psv folder should be images with nonzero values.
https://drive.google.com/drive/folders/1dvLllgq01oLWqfLZHZgrYuicQy04-88z?usp=sharing 2