stitch *.jpg stitches all jpg files in the current directory stitch img_dir/IMG*.jpg stitches all files in the img_dir directory starting with "IMG" and ending with ".jpg" stitch img1.jpg img2.jpg ...

A cv2 import statement has pytest-cov looking for two source files in cwd instead of in site-packages/cv2. So two warnings are issued, because coverage doesn't find config.py and config-3.py. This ...