python serial problem

[jakupjang]

It is made with pico c, c++ sdk, tinyusb.
However, the keyboard and mouse signals were not working when communicating serially in python language. What's the problem?
cdc code

//--------------------------------------------------------------------+
// USB CDC
//--------------------------------------------------------------------+
void cdc_task(void)
{
// connected() check for DTR bit
// Most but not all terminal client set this when making connection
// if ( tud_cdc_connected() )
{
// connected and there are data available
if ( tud_cdc_available() )
{
uint8_t buf[64];

        // read and echo back
        uint32_t count = tud_cdc_read(buf, sizeof(buf));

        for(uint32_t i=0; i<count; i++)
        {
            tud_cdc_write_char(buf[i]);

            if ( buf[i] == '\r' ) tud_cdc_write_char('\n');
        }

        tud_cdc_write_flush();
    }
}

}

// Invoked when cdc when line state changed e.g connected/disconnected
void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
{
(void) itf;
(void) rts;

// connected
if ( dtr )
{
    // print initial message when connected
    tud_cdc_write_str("\r\nTinyUSB CDC MSC device example\r\n");
    tud_cdc_write_flush();
}

}

// Invoked when CDC interface received data from host
void tud_cdc_rx_cb(uint8_t itf)
{
(void) itf;
}

//--------------------------------------------------------------------+
// USB HID
//--------------------------------------------------------------------+

void hid_task(void) {
// Poll every 10ms
const uint32_t interval_ms = 10;
static uint32_t start_ms = 0;

if (board_millis() - start_ms < interval_ms) return; // not enough time
start_ms += interval_ms;

uint32_t const btn = 1;

// Remote wakeup
if (tud_suspended() && btn) {
    // Wake up host if we are in suspend mode
    // and REMOTE_WAKEUP feature is enabled by host
    tud_remote_wakeup();
}

/*------------- Mouse -------------*/
if (tud_hid_ready()) {
    if (btn) {
        int8_t const delta = 5;

        // no button, right + down, no scroll pan
        // tud_hid_mouse_report(REPORT_ID_MOUSE, 0x00, delta, delta, 0, 0);

        // delay a bit before attempt to send keyboard report
        board_delay(10);
    }
}

/*------------- Keyboard -------------*/
if (tud_hid_ready()) {
    // use to avoid send multiple consecutive zero report for keyboard
    static bool has_key = false;

    static bool toggle = false;
    if (toggle = !toggle) {
        uint8_t keycode[6] = {0};
        keycode[0] = HID_KEY_A;

        // tud_hid_keyboard_report(REPORT_ID_KEYBOARD, 0, keycode);

        has_key = true;
    } else {
        // send empty key report if previously has key pressed
        // if (has_key) tud_hid_keyboard_report(REPORT_ID_KEYBOARD, 0, NULL);
        has_key = false;
    }
}

}

// Invoked when received GET_REPORT control request
// Application must fill buffer report's content and return its length.
// Return zero will cause the stack to STALL request
uint16_t tud_hid_get_report_cb(uint8_t report_id, hid_report_type_t report_type, uint8_t *buffer, uint16_t reqlen) {
// TODO not Implemented
(void) report_id;
(void) report_type;
(void) buffer;
(void) reqlen;

return 0;

}

// Invoked when received SET_REPORT control request or
// received data on OUT endpoint ( Report ID = 0, Type = 0 )
void tud_hid_set_report_cb(uint8_t report_id, hid_report_type_t report_type, uint8_t const *buffer, uint16_t bufsize) {
// TODO set LED based on CAPLOCK, NUMLOCK etc...
(void) report_id;
(void) report_type;
(void) buffer;
(void) bufsize;
}

How do I create a source on python to use a keyboard and mouse?

[jakupjang]

help. please.