pyqt5写一个抽奖程序（未美化）

今天闲来无事，用python写了一个抽奖程序
pyqt版本：pyqt5
python版本：3.6.6
下面直接上代码，有建议的话，欢迎大家交流评论!

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'Lucky_draw.ui'
#
# Created by: PyQt5 UI code generator 5.15.1
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import (QMainWindow, QApplication,QLabel,QLineEdit,QMessageBox,QComboBox)
from PyQt5.QtCore import Qt, QSize
from PyQt5.QtCore import Qt, QThread, pyqtSignal
import sys
import random
import time

tester = ["发", "我", "人", "他", "去", "个", "给", "如", "吃", "分"]


class Ui_Lucky_draw(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(658, 526)
        self.horizontalLayoutWidget = QtWidgets.QWidget(Dialog)
        self.horizontalLayoutWidget.setGeometry(QtCore.QRect(9, 9, 641, 401))
        self.horizontalLayoutWidget.setObjectName("horizontalLayoutWidget")
        self.horizontalLayout = QtWidgets.QHBoxLayout(self.horizontalLayoutWidget)
        self.horizontalLayout.setContentsMargins(0,