Skim a python package to only include code used by a certain entry point

	# Import/Call Entrypoint
	# from mypy.stubgen import generate_stubs

	from sysconfig import get_paths
	from pathlib import Path
	from shutil import copy2
	from sys import modules

	# DEFINE TARGETS
	PACKAGE_NAME = "mypy"
	OUTPUT_DIR = Path("./isolated_source")

	SITE_PACKAGES = Path(get_paths()["purelib"])

	# FILTER AND COPY ONLY TOUCHED LOCAL SOURCE FILES
	for name, module in modules.items():

	# Look only for modules belonging to your package
	if name.startswith(PACKAGE_NAME) and hasattr(module, "__file__"):

	src = Path(module.__file__)

	if src.suffix == ".pyc":
	src = src.with_suffix('.py')

	if src.exists():

	rel = src.relative_to(SITE_PACKAGES)
	dst = OUTPUT_DIR.joinpath(rel)

	dst.parent.mkdir(parents=True, exist_ok=True)
	copy2(src, dst)

	print()
	print(f"{rel=}")
	print(f"{src=}")
	print(f"{dst=}")
	print()

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