想让执行完程序后自动关闭窗口，而不用点击右上角叉叉的方法是self.close()，具体应用还是以treewidget为例。

前面我们写了一个treewidget的界面，并且实现了界面代码分离，具体实现不多讲了，直接上代码：

treeview4.py

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

Form implementation generated from reading ui file 'treeview4.ui'

Created by: PyQt5 UI code generator 5.13.0

WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.treeWidget = QtWidgets.QTreeWidget(self.centralwidget)
self.treeWidget.setGeometry(QtCore.QRect(150, 80, 411, 341))
self.treeWidget.setObjectName("treeWidget")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)

    self.retranslateUi(MainWindow)  
    QtCore.QMetaObject.connectSlotsByName(MainWindow)

def retranslateUi(self, MainWindow):  
    \_translate = QtCore.QCoreApplication.translate  
    MainWindow.setWindowTitle(\_translate("MainWindow", "MainWindow"))  
    self.treeWidget.headerItem().setText(0, \_translate("MainWindow", "Key"))  
    self.treeWidget.headerItem().setText(1, \_translate("MainWindow", "Value"))

treeview4_run.py

from PyQt5.QtWidgets import QApplication, QMainWindow, QFileDialog
from PyQt5 import QtCore, QtGui, QtWidgets
import treeview4
import treeview_data
import sys
import threading
import time

class MainCode(QMainWindow, treeview4.Ui_MainWindow):
list_result_update = QtCore.pyqtSignal([int, int, str])

def \_\_init\_\_(self):  
    QMainWindow.\_\_init\_\_(self)  
    treeview4.Ui\_MainWindow.\_\_init\_\_(self)  
    self.setupUi(self)  
    # 设置列宽  
    self.treeWidget.setColumnWidth(0, 200)

    \_translate = QtCore.QCoreApplication.translate  
    self.initial\_tree\_view(\_translate)  
    self.treeWidget.expandAll()  
    # 用列表触发槽函数  
    self.list\_result\_update.connect(self.modified\_treewidget)  
    # 线程函数  
    self.run()

def run(self):  
    th = threading.Thread(target=self.go\_update)  
    th.setDaemon(True)  
    th.start()

def initial\_tree\_view(self, \_translate):  
    list\_objects = \[\]  
    test1 = treeview\_data.DataCollection()  
    test1.set\_module({"Test1": "waiting"})  
    test1.add\_item({"a1": "waiting"})  
    test1.add\_item({"b1": "waiting"})  
    test1.add\_item({"c1": "waiting"})  
    list\_objects.append(test1)

    test2 = treeview\_data.DataCollection()  
    test2.set\_module({"Test2": "waiting"})  
    test2.add\_item({"a2": "waiting"})  
    test2.add\_item({"b2": "waiting"})  
    test2.add\_item({"c2": "waiting"})  
    test2.add\_item({"d2": "waiting"})  
    list\_objects.append(test2)

    test3 = treeview\_data.DataCollection()  
    test3.set\_module({"Test3": "waiting"})  
    test3.add\_item({"a2": "waiting"})  
    test3.add\_item({"b2": "waiting"})  
    test3.add\_item({"c2": "waiting"})  
    test3.add\_item({"d2": "waiting"})  
    list\_objects.append(test3)

    for object\_num, object\_module in enumerate(list\_objects):  
        item\_0 = QtWidgets.QTreeWidgetItem(self.treeWidget)  
        brush = QtGui.QBrush(QtGui.QColor(176, 165, 172))  
        brush.setStyle(QtCore.Qt.SolidPattern)  
        item\_0.setBackground(0, brush)  
        for module\_name, module\_result in object\_module.module.items():  
            brush = QtGui.QBrush(QtGui.QColor(0, 255, 0))  
            brush.setStyle(QtCore.Qt.SolidPattern)  
            item\_0.setBackground(1, brush)  
            self.treeWidget.topLevelItem(object\_num).setText(0, \_translate("MainWindow", module\_name))  
            self.treeWidget.topLevelItem(object\_num).setText(1, \_translate("MainWindow", module\_result))  
        for item\_num, item\_dic in enumerate(object\_module.items):  
            for item\_name, item\_result in item\_dic.items():  
                item\_1 = QtWidgets.QTreeWidgetItem(item\_0)  
                self.treeWidget.topLevelItem(object\_num).child(item\_num).setText(0, \_translate("MainWindow",  
                                                                                               item\_name))  
                self.treeWidget.topLevelItem(object\_num).child(item\_num).setText(1, \_translate("MainWindow",  
                                                                                               item\_result))

def modified\_treewidget(self, num\_one, num\_two, str\_one):  
    \_translate = QtCore.QCoreApplication.translate  
    brush = QtGui.QBrush(QtGui.QColor(0, 255, 0))  
    brush.setStyle(QtCore.Qt.SolidPattern)  
    self.treeWidget.topLevelItem(num\_one).child(num\_two).setBackground(1, brush)  
    self.treeWidget.topLevelItem(num\_one).child(num\_two).setText(1, \_translate(  
        "MainWindow",  
        str\_one))

def go\_update(self):  
    time.sleep(1)  
    # 更新treeview  
    self.list\_result\_update.emit(1, 1, "aaaaaaa")  
    time.sleep(1)  
    # 关闭窗口  
    self.close()

if __name__ == "__main__":
app = QApplication(sys.argv)
md = MainCode()
md.show()
app.exec_()
# sys.exit(app.exec_())

具体实现效果就是先初始化树结构，等待一秒后改变其中一个的值， 在等待一秒退出窗口。

效果图：