PyQT5 QFileDialog文件操作程序崩溃处理

最近用PyQT写个窗体工具，用到QFileDialog处理文件时程序就崩掉了，网上查的降版本，换32位解释器都尝试了都不靠谱，后面无意中看到一段示例代码终于解决了，记录一下，在给掉坑里的小伙伴做个参考。

原代码是用 qt 模板生成的，添加的构造方法：

# -*- coding: utf-8 -*-
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QMessageBox
from PyQt5.QtWidgets import QFileDialog
from PyQt5.QtWidgets import QWidget
import os
import time


class Ui_MainWindow(Object):
    def __init__(self):
        self.zh_CN = {}
        self.en_US = {}
        self.cwd = os.getcwd()

    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.tabWidget = QtWidgets.QTabWidget(self.centralwidget)
        self.tabWidget.setGeometry(QtCore.QRect(0, 0, 791, 551))
        self.tabWidget.setObjectName("tabWidget")
        

        self.tab = QtWidgets.QWidget()
        self.tab.setObjectName("tab")
        self.lineEdit = QtWidgets.QLineEdit(self.tab)
        self.lineEdit.setGeometry(QtCore.QRect(30, 40, 541, 31))
        self.lineEdit.setObjectName("lineEdit")
        self.pushButton = QtWidgets.QPushButton(self.tab)
        self.pushButton.setGeometry(QtCore.QRect(620, 40, 91, 31))
        self.pushButton.setObjectName("pushButton")
        self.pushButton.clicked.connect(self.openFolder)
        self.tabWidget.addTab(self.tab, "")
   

    def openFolder(self):
        dir_choose = QFileDialog.getExistingDirectory(self,"选取文件夹",self.cwd) 
        self.lineEdit.setText(str(dir_choose))


    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
		...

修改后代码：

# -*- coding: utf-8 -*-
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QMessageBox
from PyQt5.QtWidgets import QFileDialog
from PyQt5.QtWidgets import QWidget
import os
import time


class Ui_MainWindow(QWidget):
    def __init__(self):
        super(Ui_MainWindow, self).__init__()
        self.zh_CN = {}
        self.en_US = {}
        self.cwd = os.getcwd()

    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.tabWidget = QtWidgets.QTabWidget(self.centralwidget)
        self.tabWidget.setGeometry(QtCore.QRect(0, 0, 791, 551))
        self.tabWidget.setObjectName("tabWidget")
        

        self.tab = QtWidgets.QWidget()
        self.tab.setObjectName("tab")
        self.lineEdit = QtWidgets.QLineEdit(self.tab)
        self.lineEdit.setGeometry(QtCore.QRect(30, 40, 541, 31))
        self.lineEdit.setObjectName("lineEdit")
        self.pushButton = QtWidgets.QPushButton(self.tab)
        self.pushButton.setGeometry(QtCore.QRect(620, 40, 91, 31))
        self.pushButton.setObjectName("pushButton_4")
        self.pushButton.clicked.connect(self.openFolder)
        self.tabWidget.addTab(self.tab, "")
   

    def openFolder(self):
        dir_choose = QFileDialog.getExistingDirectory(self,"选取文件夹",self.cwd) 
        self.lineEdit.setText(str(dir_choose))


    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate