human
I wrote the below code

    from macholib import util
    from macholib.MachO import MachO
    if (os.path.basename(libname) in _BOOTLOADER_FNAMES):
        return
    parent_dir = ''
    if os.path.dirname(distname):
        parent_level = len(os.path.dirname(distname).split(os.sep))
        parent_dir = (parent_level * (os.pardir + os.sep))
    def match_func(pth):
        '\n                                For    system    libraries    is    still    used    absolute    path.    It    is    unchanged.\n                                '
        if (not util.in_system_path(pth)):
            return os.path.join('@loader_path', parent_dir, os.path.basename(pth))
    dll = MachO(libname)
    dll.rewriteLoadCommands(match_func)
    try:
        f = open(dll.filename, 'rb+')
        for header in dll.headers:
            f.seek(0)
            dll.write(f)
        f.seek(0, 2)
        f.flush()
        f.close()
    except Exception:
        pass

What's a good function header?
assistant
#Here's a good function header.

def mac_set_relative_dylib_deps(libname, distname):