232               int buffering, const char *encoding, const char *errors,  in _io_open_impl()  argument
365     if (binary && buffering == 1) {  in _io_open_impl()
402     if (buffering < 0) {  in _io_open_impl()
412     if (buffering == 1 || isatty) {  in _io_open_impl()
413         buffering = -1;  in _io_open_impl()
419     if (buffering < 0) {  in _io_open_impl()
424         buffering = PyLong_AsLong(blksize_obj);  in _io_open_impl()
426         if (buffering == -1 && PyErr_Occurred())  in _io_open_impl()
429     if (buffering < 0) {  in _io_open_impl()
436     if (buffering == 0) {  in _io_open_impl()
463         buffer = PyObject_CallFunction(Buffered_class, "Oi", raw, buffering);  in _io_open_impl()