Function _access_check

tools/python-3.11.9-amd64/Lib/shutil.py:1475–1477

(fn, mode)

# Additionally check that `file` is not a directory, as on Windows
# directories pass the os.access check.
def _access_check(fn, mode):
    return (os.path.exists(fn) and os.access(fn, mode)
            and not os.path.isdir(fn))


def which(cmd, mode=os.F_OK | os.X_OK, path=None):