python：treewidght使用、字典使用、鼠标右键功能、Fernet加密、中文保存.bin、文件权限修改、QMessageBox reply使用

主窗口：

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# -*- coding: utf-8 -*-   # Form implementation generated from reading ui file 'caiya_2.ui' # # Created by: PyQt5 UI code generator 5.14.2 # # 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.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)         self.verticalLayout.setObjectName("verticalLayout")         self.label = QtWidgets.QLabel(self.centralwidget)         font = QtGui.QFont()         font.setFamily("华文楷体")         font.setPointSize(16)         self.label.setFont(font)         self.label.setAlignment(QtCore.Qt.AlignCenter)         self.label.setObjectName("label")         self.verticalLayout.addWidget(self.label)         self.line = QtWidgets.QFrame(self.centralwidget)         self.line.setFrameShape(QtWidgets.QFrame.HLine)         self.line.setFrameShadow(QtWidgets.QFrame.Sunken)         self.line.setObjectName("line")         self.verticalLayout.addWidget(self.line)         self.horizontalLayout = QtWidgets.QHBoxLayout()         self.horizontalLayout.setObjectName("horizontalLayout")         self.pushButton = QtWidgets.QPushButton(self.centralwidget)         font = QtGui.QFont()         font.setPointSize(12)         self.pushButton.setFont(font)         self.pushButton.setText("")         self.pushButton.setObjectName("pushButton")         self.horizontalLayout.addWidget(self.pushButton)         self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)         font = QtGui.QFont()         font.setFamily("Times New Roman")         font.setPointSize(12)         self.lineEdit.setFont(font)         self.lineEdit.setObjectName("lineEdit")         self.horizontalLayout.addWidget(self.lineEdit)         self.verticalLayout.addLayout(self.horizontalLayout)         self.verticalLayout_2 = QtWidgets.QVBoxLayout()         self.verticalLayout_2.setObjectName("verticalLayout_2")         self.treeWidget = QtWidgets.QTreeWidget(self.centralwidget)         sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)         sizePolicy.setHorizontalStretch(0)         sizePolicy.setVerticalStretch(0)         sizePolicy.setHeightForWidth(self.treeWidget.sizePolicy().hasHeightForWidth())         self.treeWidget.setSizePolicy(sizePolicy)         font = QtGui.QFont()         font.setFamily("Times New Roman")         font.setPointSize(12)         self.treeWidget.setFont(font)         self.treeWidget.setObjectName("treeWidget")         self.treeWidget.headerItem().setText(0, "1")         self.verticalLayout_2.addWidget(self.treeWidget)         self.horizontalLayout_3 = QtWidgets.QHBoxLayout()         self.horizontalLayout_3.setObjectName("horizontalLayout_3")         self.textBrowser = QtWidgets.QTextBrowser(self.centralwidget)         font = QtGui.QFont()         font.setFamily("Times New Roman")         font.setPointSize(12)         self.textBrowser.setFont(font)         self.textBrowser.setObjectName("textBrowser")         self.horizontalLayout_3.addWidget(self.textBrowser)         self.verticalLayout_3 = QtWidgets.QVBoxLayout()         self.verticalLayout_3.setObjectName("verticalLayout_3")         self.textBrowser_2 = QtWidgets.QTextBrowser(self.centralwidget)         sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Expanding)         sizePolicy.setHorizontalStretch(0)         sizePolicy.setVerticalStretch(0)         sizePolicy.setHeightForWidth(self.textBrowser_2.sizePolicy().hasHeightForWidth())         self.textBrowser_2.setSizePolicy(sizePolicy)         font = QtGui.QFont()         font.setFamily("宋体")         font.setPointSize(12)         self.textBrowser_2.setFont(font)         self.textBrowser_2.setObjectName("textBrowser_2")         self.verticalLayout_3.addWidget(self.textBrowser_2)         self.horizontalLayout_2 = QtWidgets.QHBoxLayout()         self.horizontalLayout_2.setObjectName("horizontalLayout_2")         self.label_3 = QtWidgets.QLabel(self.centralwidget)         font = QtGui.QFont()         font.setFamily("楷体")         font.setPointSize(12)         self.label_3.setFont(font)         self.label_3.setObjectName("label_3")         self.horizontalLayout_2.addWidget(self.label_3)         self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)         font = QtGui.QFont()         font.setFamily("宋体")         font.setPointSize(12)         self.lineEdit_2.setFont(font)         self.lineEdit_2.setObjectName("lineEdit_2")         self.horizontalLayout_2.addWidget(self.lineEdit_2)         self.verticalLayout_3.addLayout(self.horizontalLayout_2)         self.horizontalLayout_3.addLayout(self.verticalLayout_3)         self.verticalLayout_2.addLayout(self.horizontalLayout_3)         self.verticalLayout.addLayout(self.verticalLayout_2)         MainWindow.setCentralWidget(self.centralwidget)         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.label.setText(_translate("MainWindow", "电子记录"))         self.label_3.setText(_translate("MainWindow", "目录"))

 副窗口：

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# -*- coding: utf-8 -*-   # Form implementation generated from reading ui file 'caiya_3.ui' # # Created by: PyQt5 UI code generator 5.14.2 # # 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.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)         self.verticalLayout.setObjectName("verticalLayout")         self.label_3 = QtWidgets.QLabel(self.centralwidget)         self.label_3.setAlignment(QtCore.Qt.AlignCenter)         self.label_3.setObjectName("label_3")         self.verticalLayout.addWidget(self.label_3)         self.horizontalLayout_2 = QtWidgets.QHBoxLayout()         self.horizontalLayout_2.setObjectName("horizontalLayout_2")         self.label_2 = QtWidgets.QLabel(self.centralwidget)         self.label_2.setObjectName("label_2")         self.horizontalLayout_2.addWidget(self.label_2)         self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)         self.lineEdit.setObjectName("lineEdit")         self.horizontalLayout_2.addWidget(self.lineEdit)         self.verticalLayout.addLayout(self.horizontalLayout_2)         self.horizontalLayout_3 = QtWidgets.QHBoxLayout()         self.horizontalLayout_3.setObjectName("horizontalLayout_3")         self.label_4 = QtWidgets.QLabel(self.centralwidget)         self.label_4.setObjectName("label_4")         self.horizontalLayout_3.addWidget(self.label_4)         self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)         self.lineEdit_2.setObjectName("lineEdit_2")         self.horizontalLayout_3.addWidget(self.lineEdit_2)         self.label_5 = QtWidgets.QLabel(self.centralwidget)         self.label_5.setObjectName("label_5")         self.horizontalLayout_3.addWidget(self.label_5)         self.lineEdit_3 = QtWidgets.QLineEdit(self.centralwidget)         self.lineEdit_3.setObjectName("lineEdit_3")         self.horizontalLayout_3.addWidget(self.lineEdit_3)         self.verticalLayout.addLayout(self.horizontalLayout_3)         self.horizontalLayout_4 = QtWidgets.QHBoxLayout()         self.horizontalLayout_4.setObjectName("horizontalLayout_4")         self.label_6 = QtWidgets.QLabel(self.centralwidget)         self.label_6.setObjectName("label_6")         self.horizontalLayout_4.addWidget(self.label_6)         self.lineEdit_4 = QtWidgets.QLineEdit(self.centralwidget)         self.lineEdit_4.setObjectName("lineEdit_4")         self.horizontalLayout_4.addWidget(self.lineEdit_4)         self.verticalLayout.addLayout(self.horizontalLayout_4)         self.line = QtWidgets.QFrame(self.centralwidget)         self.line.setFrameShape(QtWidgets.QFrame.HLine)         self.line.setFrameShadow(QtWidgets.QFrame.Sunken)         self.line.setObjectName("line")         self.verticalLayout.addWidget(self.line)         self.horizontalLayout_5 = QtWidgets.QHBoxLayout()         self.horizontalLayout_5.setObjectName("horizontalLayout_5")         self.label_7 = QtWidgets.QLabel(self.centralwidget)         self.label_7.setObjectName("label_7")         self.horizontalLayout_5.addWidget(self.label_7)         self.lineEdit_5 = QtWidgets.QLineEdit(self.centralwidget)         self.lineEdit_5.setAlignment(QtCore.Qt.AlignCenter)         self.lineEdit_5.setObjectName("lineEdit_5")         self.horizontalLayout_5.addWidget(self.lineEdit_5)         self.verticalLayout.addLayout(self.horizontalLayout_5)         self.label = QtWidgets.QLabel(self.centralwidget)         self.label.setObjectName("label")         self.verticalLayout.addWidget(self.label)         self.textEdit = QtWidgets.QTextEdit(self.centralwidget)         self.textEdit.setObjectName("textEdit")         self.verticalLayout.addWidget(self.textEdit)         self.horizontalLayout = QtWidgets.QHBoxLayout()         self.horizontalLayout.setObjectName("horizontalLayout")         self.pushButton = QtWidgets.QPushButton(self.centralwidget)         self.pushButton.setObjectName("pushButton")         self.horizontalLayout.addWidget(self.pushButton)         spacerItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)         self.horizontalLayout.addItem(spacerItem)         self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)         self.pushButton_2.setObjectName("pushButton_2")         self.horizontalLayout.addWidget(self.pushButton_2)         self.verticalLayout.addLayout(self.horizontalLayout)         MainWindow.setCentralWidget(self.centralwidget)         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", "信息输入"))         self.label_3.setText(_translate("MainWindow", "基本信息"))         self.label_2.setText(_translate("MainWindow", "标题："))         self.label_4.setText(_translate("MainWindow", "姓名："))         self.label_5.setText(_translate("MainWindow", "班级："))         self.label_6.setText(_translate("MainWindow", "链接："))         self.label_7.setText(_translate("MainWindow", "分类："))         self.label.setText(_translate("MainWindow", "备注消息："))         self.pushButton.setText(_translate("MainWindow", "确定"))         self.pushButton_2.setText(_translate("MainWindow", "取消"))

 main代码：

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import sys from cryptography.fernet import Fernet import os from stat import S_IROTH,S_IWRITE import struct import random import pickle import qtawesome from PyQt5 import QtWidgets from PyQt5.QtWidgets import QApplication, QMessageBox, QTreeWidgetItem, QMenu from PyQt5.QtCore import Qt import caiya_2 import caiya_3   key_list=[b'm8jj9QWq2zmebJyvF8d_WFmUGflkfNbP-QVms7gJ4Vc=', b'EcuWvJ2aWUrAJ3Wdt0LmnfJy6ES3YzWvR4MP7ilwCLY=',           b'00Aj75upYXW1YB9lGm-vWeTulAQ3FWarxH6IumzBAf8=', b'K14MYHjJvQljdIlVPU0TjWYaI_8MmsekwlvU9hE9K4A=',           b'1jWrIDnrW9IKNW_Q0NKE_jssc-Wad73bfgHVT8GmBpU=', b'OUqmLUQhti5lEdKL6YPYWx94Xmo-QiZBX1t9gK0OvTU=',           b'5RIhRzs5KS7e3DyKzc_4SN3pmxIlzltLmP8lK1CzP5E=', b'pgAYIISedDl1rK0ag96-B08bOrB3iaoxyU9kOPpKRnw=',           b'aldczwkDaBwvdtgCgIRU5gGZPtOK25VUAb7cLKc0XT0=', b'94q4-JHp_xaKiSjq1Tto8NAqllCCDYMlkjiCwS1Y9rs=']     class my_mainwindow(object):     def __init__(self):         app = QApplication(sys.argv)         app.setWindowIcon(qtawesome.icon('fa.shield', color='blue'))         #########################         self.myMainWindow =MainWindow()         self.myui = caiya_2.Ui_MainWindow()         self.myui.setupUi(self.myMainWindow)         self.Secondary_window = QtWidgets.QMainWindow()         self.mini = caiya_3.Ui_MainWindow()         self.mini.setupUi(self.Secondary_window)         self.Secondary_window.setFixedSize(600, 400)  # 禁止缩放         self.Secondary_window.setWindowFlags(Qt.WindowMinimizeButtonHint)  # 仅保存缩小按钮         # self.mini.lineEdit_5.setEnabled(False)         self.myui.pushButton.setIcon(qtawesome.icon('fa.search', color='blue'))         #********************************************************************************         #获取数据         self.dictforcontent=self.strread(key_list)         if self.dictforcontent== {}:             self.dictforcontent={'标题': ['新建条目'],                   '姓名': ['输入名字~'],                   '班级': ['xxx'],                   '链接': ['xxx'],                   '备注': ['xxx'],                   'ID': ['xxx']}         listforsort=set(self.dictforcontent["ID"])         #end         #treewidght创建         self.myui.treeWidget.setHeaderLabels(["目录","简述"])         for name in listforsort:             root = QTreeWidgetItem(self.myui.treeWidget)  # 创建节点             root.setIcon(0, qtawesome.icon('fa.folder', color='green'))             root.setText(0, name)  # 设置顶级节点文本             for i in range(len(self.dictforcontent["ID"])):  # 遍历字典的ID值                 value=self.dictforcontent["ID"][i]                 if value==name:                     child = QTreeWidgetItem(root)  # 创建子节点                     child.setIcon(0, qtawesome.icon('fa.hand-o-right', color='black'))                     child.setText(0, self.dictforcontent["标题"][i])  # 设置第一列的值                     child.setText(1, self.dictforcontent["姓名"][i])  # 设置第二列的值                     self.myui.treeWidget.setAlternatingRowColors(True)                     self.myui.treeWidget.addTopLevelItem(root)  # 将创建的树节点添加到树控件中         #单机绑定事件         self.myui.treeWidget.clicked.connect(self.gettext)         #右键功能开启         self.myui.treeWidget.setContextMenuPolicy(Qt.CustomContextMenu) # 打开右键菜单的策略         self.myui.treeWidget.customContextMenuRequested.connect(self.do_custom_context_menu_request)# 绑定事件         #相关变量初始化         self.Right_click = True  # treewidght的右键功能使能         self.row_num = -1  # 节点的行号         self.parent_num = -1  # 存放行的父节点的行号         self.childcnt = 0 #保存字典选中的inx         self.lastID=''#保存原始ID         #按键绑定打开         self.click_pushbutton(self.myMainWindow)         #********************************************************************************         self.myMainWindow.show()         #####################         sys.exit(app.exec_())         def click_pushbutton(self,myMainWindow):         self.myui.pushButton.clicked.connect(lambda: self.find(myMainWindow))         self.mini.pushButton.clicked.connect(self.modify)         self.mini.pushButton_2.clicked.connect(self.miniclose)       def find(self,myMainWindow):         findstr = self.myui.lineEdit.text()         if len(findstr) == 0:             self.myui.textBrowser_2.clear()             self.myui.textBrowser_2.setText("空气搜不到哦")         else:             cnt_match=0             self.myui.textBrowser_2.clear()             for i in range(len(self.dictforcontent["标题"])):                 result = findstr in self.dictforcontent["标题"][i]                 if result==True:                     cnt_match=cnt_match+1                     self.myui.textBrowser_2.append("**匹配姓名%d**"%(cnt_match))                     self.myui.textBrowser_2.append("姓名匹配：%s" % (self.dictforcontent["标题"][i]))                     self.myui.textBrowser_2.append("目录ID：%s" % (self.dictforcontent["ID"][i]))             if cnt_match==0:                 self.myui.textBrowser_2.append("未发现匹配内容")       def gettext(self):         account=self.myui.treeWidget.currentItem().text(0)         self.myui.lineEdit_2.setText(account)         for i in range(len(self.dictforcontent["标题"])):  # 遍历字典的标题值             value = self.dictforcontent["标题"][i]             if value == account:                 self.myui.textBrowser.clear()                 self.myui.textBrowser.append("标题:%s" %self.dictforcontent["标题"][i])                 self.myui.textBrowser.append("姓名:%s" % self.dictforcontent["姓名"][i])                 self.myui.textBrowser.append("班级:%s" % self.dictforcontent["班级"][i])                 self.myui.textBrowser.append("链接:%s" % self.dictforcontent["链接"][i])                 self.myui.textBrowser.append("备注:%s" % self.dictforcontent["备注"][i])       def do_custom_context_menu_request(self,pos):         row_num = -1  # 当前节点的行号         parent_num = -1  # 存放当前行的父节点的行号         if self.myui.treeWidget.selectionModel().selection().indexes() !=[] and self.Right_click:             for i in self.myui.treeWidget.selectionModel().selection().indexes():                 row_num = i.row()                 parent_num = i.parent().row()             if parent_num == -1:                 menu = QMenu()                 item1 = menu.addAction(u"删除这一分类")                 item2 = menu.addAction(u"增加一个分类")                 item3 = menu.addAction(u"修改这一分类")                 item4 = menu.addAction(u"增加一条记录")                 action = menu.exec_(self.myui.treeWidget.mapToGlobal(pos))                 if action == item1:                     IDmodifyflag = 0                     # 判断当前目录下是否有值                     for i in self.dictforcontent["ID"]:                         if i == self.myui.treeWidget.currentItem().text(0):                             QMessageBox.information(self.myMainWindow, "提醒你一下", "这个目录下面有内容，先删掉内容", QMessageBox.Yes)                             IDmodifyflag = 1                             break                     if IDmodifyflag==0:                         reply = QMessageBox.question(self.myMainWindow, "问你一下", "你确定要删除吗？",                                                      QMessageBox.Yes | QMessageBox.No)                         if reply == QtWidgets.QMessageBox.Yes:                             delitem = self.myui.treeWidget.currentItem()                             rootIndex = self.myui.treeWidget.indexOfTopLevelItem(delitem)                             self.myui.treeWidget.takeTopLevelItem(rootIndex)                             self.myui.textBrowser_2.clear()                             self.myui.textBrowser_2.setText("目录删除成功")                 elif action == item2:                     reply = QMessageBox.question(self.myMainWindow, "问你一下", "确定要增加一条并且目录已经在右下角更新好了吗？",                                                  QMessageBox.Yes | QMessageBox.No)                     if reply == QtWidgets.QMessageBox.Yes:                         IDmodifyflag = 0                         # 判断顶层节点是否重复                         # 获取最顶级节点的总数                         rootCount = self.myui.treeWidget.topLevelItemCount()                         for i in range(rootCount):                             # 取得顶层项的item索引地址                             rootItem = self.myui.treeWidget.topLevelItem(i)                             rootKey = rootItem.text(0)                             if rootKey == str(self.myui.lineEdit_2.text()):                                 QMessageBox.information(self.myMainWindow, "提醒你一下", "你重复了", QMessageBox.Yes)                                 IDmodifyflag = 1                                 break                         if IDmodifyflag==0:                             root = QTreeWidgetItem(self.myui.treeWidget)  # 创建节点                             root.setIcon(0, qtawesome.icon('fa.folder', color='green'))                             root.setText(0, self.myui.lineEdit_2.text())  # 设置顶级节点文本                             self.myui.textBrowser_2.clear()                             self.myui.textBrowser_2.setText("目录增加成功")                 elif action == item3:                     reply = QMessageBox.question(self.myMainWindow, "问你一下", "确定要修改吗？",                                                  QMessageBox.Yes | QMessageBox.No)                     if reply == QtWidgets.QMessageBox.Yes:                         IDmodifyflag = 0                         # 判断ID是否重复                         for i in self.dictforcontent["ID"]:                             if i== self.myui.lineEdit_2.text() and self.myui.lineEdit_2.text()!=self.myui.treeWidget.currentItem().text(0):                                 QMessageBox.information(self.myMainWindow, "提醒你一下", "修改内容已存在", QMessageBox.Yes)                                 IDmodifyflag = 1                                 break                         if IDmodifyflag == 0:                             for i in range(len(self.dictforcontent["ID"])):                                 if self.dictforcontent["ID"][i] ==self.myui.treeWidget.currentItem().text(0):                                     self.dictforcontent["ID"][i]=self.myui.lineEdit_2.text()                             self.myui.treeWidget.currentItem().setText(0,self.myui.lineEdit_2.text())                             # 更新数据库                             self.strwrite(key_list, self.dictforcontent)                             self.myui.textBrowser_2.clear()                             self.myui.textBrowser_2.setText("目录修改成功")                   elif action == item4:                     flagforcontinue=0                     for i in self.dictforcontent["标题"]:                         if i=="新增条目":                             QMessageBox.information(self.myMainWindow, "提醒你一下", "已经有新增的",QMessageBox.Yes)                             flagforcontinue=1                             break                     if flagforcontinue==0:                         reply = QMessageBox.question(self.myMainWindow, "问你一下", "确定要增加一条吗？",                                                      QMessageBox.Yes | QMessageBox.No)                         if reply == QtWidgets.QMessageBox.Yes:                             self.dictforcontent["标题"].append("新增条目")                             self.dictforcontent["姓名"].append("记得要修改它哦")                             self.dictforcontent["班级"].append("xxx")                             self.dictforcontent["链接"].append("xxx")                             self.dictforcontent["备注"].append("xxx")                             self.dictforcontent["ID"].append(self.myui.treeWidget.currentItem().text(0))                             # 根据传入的节点 Item 和节点名称，增加子节点                             item = self.myui.treeWidget.currentItem()                             childItem = QtWidgets.QTreeWidgetItem(item)                             childItem.setIcon(0, qtawesome.icon('fa.hand-o-right', color='black'))                             childItem.setText(0, self.dictforcontent["标题"][-1])  # 设置第一列的值                             childItem.setText(1, self.dictforcontent["姓名"][-1])  # 设置第二列的值                             self.myui.textBrowser_2.clear()                             self.myui.textBrowser_2.setText("条目增加成功")                 else:                     return             else:                 menu = QMenu()                 item1 = menu.addAction(u"删除这条记录")                 item2 = menu.addAction(u"修改一条记录")                 action = menu.exec_(self.myui.treeWidget.mapToGlobal(pos))                 if action == item1:                     reply=QMessageBox.question(self.myMainWindow, "问你一下哦", "你确定要删除吗？", QMessageBox.Yes | QMessageBox.No)                     if reply == QtWidgets.QMessageBox.Yes:                         delitem=self.myui.treeWidget.currentItem()                         delitem.parent().removeChild(delitem)                         self.find_dict_inx(parent_num, row_num)                         #删除字典对应内容                         del self.dictforcontent["标题"][self.childcnt]                         del self.dictforcontent["姓名"][self.childcnt]                         del self.dictforcontent["班级"][self.childcnt]                         del self.dictforcontent["链接"][self.childcnt]                         del self.dictforcontent["备注"][self.childcnt]                         del self.dictforcontent["ID"][self.childcnt]                         # 更新数据库                         self.strwrite(key_list, self.dictforcontent)                         self.myui.textBrowser_2.clear()                         self.myui.textBrowser_2.setText("数据删除成功")                 elif action == item2:                     reply=QMessageBox.question(self.myMainWindow, "问你一下", "确定要修改吗？", QMessageBox.Yes | QMessageBox.No)                     if reply == QtWidgets.QMessageBox.Yes:                         self.Right_click=False                         self.parent_num=parent_num                         self.row_num=row_num                         self.find_dict_inx(parent_num,row_num)                         #显示源数据                         self.mini.lineEdit.setText(self.dictforcontent["标题"][self.childcnt])                         self.mini.lineEdit_2.setText(self.dictforcontent["姓名"][self.childcnt])                         self.mini.lineEdit_3.setText(self.dictforcontent["班级"][self.childcnt])                         self.mini.lineEdit_4.setText(self.dictforcontent["链接"][self.childcnt])                         self.mini.textEdit.setText(self.dictforcontent["备注"][self.childcnt])                         self.lastID=self.myui.treeWidget.topLevelItem(self.parent_num).text(0)                         self.mini.lineEdit_5.setText(self.lastID)                         self.Secondary_window.show()                 else:                     return       def find_dict_inx(self,userparent_num,userrow_num):         self.childcnt=0         toptreename = self.myui.treeWidget.topLevelItem(userparent_num).text(0)         for i in range(len(self.dictforcontent["ID"])):             if self.dictforcontent["ID"][i] == toptreename:                 self.childcnt = self.childcnt + 1                 if self.childcnt == (userrow_num + 1):                     self.childcnt = i                     break       def modify(self):         modifyflag=0         IDchanged=0         IDexist=0         #判断新建标题是否重复         for i in range(len(self.dictforcontent["标题"])):             if self.dictforcontent["标题"][i] == str(self.mini.lineEdit.text()) and i!=self.childcnt:                 QMessageBox.information(self.myMainWindow, "提醒你一下", "你的标题重复", QMessageBox.Yes)                 modifyflag = 1                 self.Right_click = True                 break         #判断ID是否当前已存在         for i in self.dictforcontent["ID"]:             if i == str(self.mini.lineEdit_5.text()):                 IDexist=1                 break         if IDexist==0:             QMessageBox.information(self.myMainWindow, "提醒你一下", "你的分类不存在", QMessageBox.Yes)             modifyflag = 1#ID不存在             self.Right_click = True         elif str(self.mini.lineEdit_5.text())==self.lastID:             IDchanged=1#ID未改变         #不重复则更新数据         if modifyflag==0:             #更新数据             self.dictforcontent["标题"][self.childcnt]=str(self.mini.lineEdit.text())             self.dictforcontent["姓名"][self.childcnt]=str(self.mini.lineEdit_2.text())             self.dictforcontent["班级"][self.childcnt]=str(self.mini.lineEdit_3.text())             self.dictforcontent["链接"][self.childcnt]=str(self.mini.lineEdit_4.text())             self.dictforcontent["备注"][self.childcnt]=str(self.mini.textEdit.toPlainText())             if IDchanged==1:                 #更新treewidght                 self.myui.treeWidget.topLevelItem(self.parent_num).child(self.row_num).setText(0, self.dictforcontent["标题"][self.childcnt])                 self.myui.treeWidget.topLevelItem(self.parent_num).child(self.row_num).setText(1, self.dictforcontent["姓名"][self.childcnt])             elif IDchanged==0:                 self.dictforcontent["ID"][self.childcnt]=str(self.mini.lineEdit_5.text())                 #删除当前tree                 delitem_parent = self.myui.treeWidget.topLevelItem(self.parent_num)                 delitem=delitem_parent.child(self.row_num)                 delitem.parent().removeChild(delitem)                 #别的tree去新建                 rootCount = self.myui.treeWidget.topLevelItemCount()                 print(rootCount)                 for i in range(rootCount):                     # 取得顶层项的item索引地址                     rootItem = self.myui.treeWidget.topLevelItem(i)                     rootKey = rootItem.text(0)                     print(rootKey)                     print(self.mini.lineEdit_5.text())                     if rootKey==str(self.mini.lineEdit_5.text()):                         print("进来了")                         # 根据传入的节点 Item 和节点名称，增加子节点                         childItem = QtWidgets.QTreeWidgetItem(rootItem)                         childItem.setIcon(0, qtawesome.icon('fa.hand-o-right', color='black'))                         childItem.setText(0, self.dictforcontent["标题"][self.childcnt])  # 设置第一列的值                         childItem.setText(1, self.dictforcontent["姓名"][self.childcnt])  # 设置第二列的值                         break             # 更新数据库             self.strwrite(key_list, self.dictforcontent)             self.myui.textBrowser_2.clear()             self.myui.textBrowser_2.setText("数据修改成功")             # 关闭窗口             self.Right_click = True             self.Secondary_window.close()       def miniclose(self):         self.Right_click = True         self.Secondary_window.close()       def strwrite(self,keys, write_dict):         isfile = os.path.exists('./Data/Database.bin')         if not isfile:             self.myui.textBrowser.clear()             self.myui.textBrowser.append("完蛋，数据库不翼而飞！")         else:             key_inx = random.randint(0, 9)             # 创建加密工具             cipher = Fernet(keys[key_inx])             # 字典转为字符串（bytes数据类型）             serialized = pickle.dumps(write_dict)             # 进行加密             encrypted_text = cipher.encrypt(serialized)             # bytes数据类型转为str数据类型             encrypted_str = encrypted_text.decode("unicode_escape")             # 字符串转为asii码             encrypted_strtoasii = []             for i in encrypted_str:                 encrypted_strtoasii.append(ord(i))  # ord为将字符串转为asii码数             encrypted_strtoasii.append(key_inx)             # 文件权限修改为读写             os.chmod("./Data/Database.bin", S_IWRITE)             # 写入内容             with open("./Data/Database.bin", "wb") as fp:  # a表示在文档末尾添加内容，w则表示清除原来的内容从新写 b表示以二进制形式打开                 for x in encrypted_strtoasii:                     a = struct.pack("B", x)  # 将整数转换为二进制字符串                     fp.write(a)             # 文件权限修改为只读             os.chmod("./Data/Database.bin", S_IROTH)       def strread(self,keys):         ispath = os.path.exists('./Data')         if not ispath:             os.makedirs(r"./Data")         isfile = os.path.exists('./Data/Database.bin')         if not isfile:             with open('./Data/Database.bin', 'ab') as fp:                 pass         # 读取文件数据         with open("./Data/Database.bin", "rb") as fp:             text = fp.read()             content = struct.unpack("B" * len(text), text)  # 解包         strlist = []         decrypted_str = ""         deserialized = {}         if len(content)==0:             keyinx=-1         else:             keyinx = int(content[-1])         if len(content) == 0:             self.myui.textBrowser_2.clear()             self.myui.textBrowser_2.append("数据库空空如也")         elif len(content) % 2 == 0 or keyinx > 9 or keyinx < 0:             self.myui.textBrowser_2.clear()             self.myui.textBrowser_2.append("数据库好像有问题，删掉从新来过")         else:             self.myui.textBrowser_2.clear()             self.myui.textBrowser_2.setText("请尽情查看^_^")             try:                 for i in range(int(len(content)-1)):                     a = content[i]                     strlist.append(chr(a))  # chr表示将asii码转为对应字符             except Exception as exc:                 returnlist = str(exc)                 self.myui.textBrowser_2.clear()                 self.myui.textBrowser_2.setText(returnlist)             else:                 self.myui.textBrowser_2.setText("数据库没问题")                 # 字符列表转为字符串                 decrypted_str = decrypted_str.join(strlist)             # 字符串转为bytes数据类型             decrypted_str_text = decrypted_str.encode("unicode_escape")             # 进行解密             cipher = Fernet(keys[keyinx])             decrypted_text = cipher.decrypt(decrypted_str_text)             # 字符串转为字典             deserialized = pickle.loads(decrypted_text)         return deserialized     class MainWindow(QtWidgets.QMainWindow):     """对QMainWindow类重写，实现一些功能"""     def closeEvent(self, event):         """重写该方法主要是解决打开子窗口时，如果关闭了主窗口但子窗口仍显示的问题，         使用sys.exit(0) 时就会只要关闭了主窗口，所有关联的子窗口也会全部关闭"""         sys.exit(0)   if __name__=='__main__':     my_mainwindow()