Неправильно работает программа

self.kartinka.setPixmap(self.vyb)
self.start_time = time.time()
pygame.mixer.init()
pygame.mixer.music.load('in.wav')
pygame.mixer.music.play(0)
time.sleep(3)
self.puskk()

import sqlite3
import sys
import pygame
import time
 
from PyQt5 import uic
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPixmap
from PyQt5.QtWidgets import QMainWindow, QApplication, QPushButton, QLabel
 
 
class DBSample(QMainWindow):
    def __init__(self):
        super().__init__()
        uic.loadUi('Project.ui', self)
        self.zapusk.clicked.connect(self.puskk)
        self.flag = False
        self.razd = QPixmap('razd.jpg')
        self.vyb = QPixmap('vyb.jpg')
        self.kartinka.setPixmap(self.razd)
 
    def puskk(self):
        self.kartinka.setPixmap(self.razd)
 
    def keyPressEvent(self, event):
        if event.key() == Qt.Key_Q:
            self.kartinka.setPixmap(self.vyb)
            pygame.mixer.init()
            pygame.mixer.music.load('in.wav')
            pygame.mixer.music.play(0)
            time.sleep(3)
            self.puskk()
 
 
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = DBSample()
    ex.show()
    sys.exit(app.exec())

import sys
from PySide2 import QtWidgets, QtCore
 
 
class Worker(QtCore.QThread):
    initialized: QtCore.SignalInstance = QtCore.Signal()
 
    def run(self) -> None:
        self.msleep(3000)
        self.initialized.emit()
        self.msleep(3000)
 
 
class Example(QtWidgets.QWidget):
 
    def __init__(self, parent: QtWidgets.QWidget = None) -> None:
        QtWidgets.QWidget.__init__(self, parent, QtCore.Qt.Dialog)
 
        self.worker = Worker(self)
        self.worker.started.connect(self.workerStartEvent)
        self.worker.initialized.connect(self.workerInitializeEvent)
        self.worker.finished.connect(self.workerFinishedEvent)
 
        self.startPushButton = QtWidgets.QPushButton("Start", self)
        self.startPushButton.clicked.connect(self.worker.start)
 
        layout = QtWidgets.QVBoxLayout(self)
        layout.addWidget(self.startPushButton)
 
        if not parent:
            self.show()
 
    def workerStartEvent(self) -> None:
        self.startPushButton.setDisabled(True)
        QtWidgets.QMessageBox.information(self, "Message Box", "Worker started!")
    
    def workerInitializeEvent(self) -> None:
        QtWidgets.QMessageBox.information(self, "Message Box", "Worker initialized!")
 
    def workerFinishedEvent(self) -> None:
        self.startPushButton.setEnabled(True)
        QtWidgets.QMessageBox.information(self, "Message Box", "Worker stoped!")
 
 
if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    main = Example()
    sys.exit(app.exec_())