code: def clean_python(ctx, dry_run=False):
      
      # MAYBE NOT: "**/__pycache__"
      cleanup_dirs(["build", "dist", "*.egg-info", "**/__pycache__"],
                   dry_run=dry_run)
      if not dry_run:
          ctx.run("py.cleanup")
      cleanup_files(["**/*.pyc", "**/*.pyo", "**/*$py.class"], dry_run=dry_run)
docs: Cleanup python related files/dirs: *.pyc, *.pyo, ...