To clean up all __pycache__ files in current directory:
find . -type d -name __pycache__ -exec rm -r {} \+
To crop an image:
#left,top right,bottom
convert test.png -crop +180+140 -crop -60-140 cropped.png
reference: https://stackoverflow.com/questions/50494810/chop-4-sides-of-image-with-imagemagick