pygame multithread client socket GUI Blocking

I wanna write a gomoku game with server and client, the terminal version works good, but pygame version just blocked and can't rend anything

Here is the game execute function

• First it start a socket connection

• self._running = True in init, package get from server is like {"grid":GRID(strings with 0 and 1), "x":X, "y":Y, "player":LAST_PLAYER, "next_player":CURRENT_PLAYER, "gameover":IS_GAMEOVER}

• In the the loop:

  • parse the package
  • check if gameover, if so show information about gameover and close the socket
  • if current player is me, call on_event and let user move( I suspect this step is wrong, so the parse package step blocked the main thread? But how should I fix this ) and then send the new move package to server
  • if current player is not me, then send a special package to server I am waiting(I know this is a bit stupid)

This is the loop like

        while self._running:
            data = self.client_thread.reply_q.get(True)

            if data:
                self.last_player = data["player"]
                self.grid = self.grid_str_2_matrix(data["grid"])
                self.lastPosition = [data["x"], data["y"]]
                self.gomoku_board_init()

                if data["gameover"] == -1:
                    if data["next_player"] != self.player:
                        self.client_thread.cmd_q.put(ClientCommand(ClientCommand.SEND, {"wait": True}))
                        print("waiting")
                    else:
                        for event in pygame.event.get():
                            self.on_event(event)

                        print("new move")
                else:
                    print("game over")
                    self._running = False
                    if data["gameover"] == 0:
                        self.winner = 0
                    else:
                        self.winner = data["player"]
                    self.client_thread.cmd_q.put(ClientCommand(ClientCommand.CLOSE))
                    break
            self.on_render()
        self.on_cleanup()

and the on_event function be called in the middle to accepet user's next move

if data["gameover"] == -1:
    if data["next_player"] != self.player:
        ...
    else:    
        for event in pygame.event.get():
            self.on_event(event)

code as this

def on_event(self, event):
    print(event.type == pygame.MOUSEBUTTONUP)


    if event.type == pygame.MOUSEBUTTONUP:
        pos = pygame.mouse.get_pos()
        r = (pos[0] - PADDING + WIDTH // 2) // (WIDTH + MARGIN)
        c = (pos[1] - PADDING + WIDTH // 2) // (WIDTH + MARGIN)
        print(r, c)
        if 0 <= r < self.board_row and 0 <= c < self.board_column and self.grid[r][c] == 0:
            self.grid[r][c] = self.player
            data = {"grid":self.grid, "x":r, "y":c, "player":self.player}
            self.client_thread.cmd_q.put(ClientCommand(ClientCommand.SEND, data))

What I've tried:

• I added a print in on_event print(event.type == pygame.MOUSEBUTTONUP) and of course MOUSEBUTTONUP never happened(But I wonder why?)

• So I decide just skip this using random input

code as follows

#for event in pygame.event.get():
#    self.on_event(event)
x, y = self.random_position()
self.grid[x][y] = self.player
data = {"grid":self.grid, "x":x, "y":y, "player":self.player}
self.client_thread.cmd_q.put(ClientCommand(ClientCommand.SEND, data))

The result is package goes all right BUT GUI still blocking and even I add sleep in the while loop, it rended only when gameover

I am new in python multithread and also pygame with socket, I wrote a just pygame part it works good, so does terminal+socket.

from pygame multithread client socket GUI Blocking