282 def walk(top, topdown=True, onerror=None, followlinks=False):  argument
341     sys.audit("os.walk", top, topdown, onerror, followlinks)
342     return _walk(fspath(top), topdown, onerror, followlinks)
344 def _walk(top, topdown, onerror, followlinks):  argument
359         if onerror is not None:
360             onerror(error)
371                 if onerror is not None:
372                     onerror(error)
418                 yield from _walk(new_path, topdown, onerror, followlinks)
422             yield from _walk(new_path, topdown, onerror, followlinks)
430     def fwalk(top=".", topdown=True, onerror=None, *, follow_symlinks=False, dir_fd=None):  argument
463         sys.audit("os.fwalk", top, topdown, onerror, follow_symlinks, dir_fd)
475                                   topdown, onerror, follow_symlinks)
479     def _fwalk(topfd, toppath, isbytes, topdown, onerror, follow_symlinks):  argument
521                 if onerror is not None:
522                     onerror(err)
528                                       topdown, onerror, follow_symlinks)