Find files which are not Python 3 compatible

py_finder.py

import argparse
import subprocess
import sys

from pathlib import Path


def find_files(src_root: Path, python3: Path):
    not_py3_compatible = []
    for file in src_root.rglob('*.py'):
        print(file.resolve())
        args3 = [str(python3), '-m', 'py_compile', str(file)]
        try:
            py3_returncode = subprocess.run(args3).returncode
        except Exception:
            py3_returncode = 1
        if py3_returncode != 0:
            not_py3_compatible.append(file.resolve())
    print(f'Found {len(not_py3_compatible)} files which are not Python 3 compatible.' )
    for py2_file in not_py3_compatible:
        print(py2_file)
    return len(not_py3_compatible)


if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Find files which are not compatible with Python 3.')
    parser.add_argument('python', help='Path to Python 3 binary.')
    parser.add_argument('src', help='Path to source code root folder.')
    argments = parser.parse_args()
    src_root = Path(argments.src)
    python3 = Path(argments.python)
    ret = find_files(src_root, python3)
    sys.exit(ret)