Pyqt5 QFileDialog not working in my program for Getting Directories - pyqt

Question

I have This Qt MainWindow Shown Below:
I want my Browse button to Open a Dialog box for selecting Specific Directory.
I Went through the various post on Stack Overflow, I tried implementing the solution in the post, but It's not working for me.
Here is my Code :
from PyQt5 import QtCore, QtGui, QtWidgets
import os
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.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName("gridLayout")
self.gridLayout_2 = QtWidgets.QGridLayout()
self.gridLayout_2.setObjectName("gridLayout_2")
self.start_button = QtWidgets.QPushButton(self.centralwidget)
self.start_button.setAutoFillBackground(False)
self.start_button.setAutoDefault(False)
self.start_button.setDefault(False)
self.start_button.setFlat(False)
self.start_button.setObjectName("start_button")
self.start_button.clicked.connect(lambda: self.start_button_click())
self.gridLayout_2.addWidget(self.start_button, 0, 0, 1, 1)
self.Br_button = QtWidgets.QPushButton(self.centralwidget)
self.Br_button.setObjectName("Br_button")
self.Br_button.clicked.connect(lambda: self.browse_button())
self.gridLayout_2.addWidget(self.Br_button, 2, 0, 1, 1)
self.label = QtWidgets.QLabel(self.centralwidget)
font = QtGui.QFont()
font.setPointSize(14)
font.setBold(True)
font.setWeight(75)
self.label.setFont(font)
self.label.setObjectName("label")
self.gridLayout_2.addWidget(self.label, 2, 1, 1, 1, QtCore.Qt.AlignHCenter)
self.tableWidget = QtWidgets.QTableWidget(self.centralwidget)
self.tableWidget.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
self.tableWidget.setObjectName("tableWidget")
self.tableWidget.setColumnCount(0)
self.tableWidget.setRowCount(0)
self.gridLayout_2.addWidget(self.tableWidget, 3, 0, 1, 2)
self.gridLayout.addLayout(self.gridLayout_2, 0, 0, 1, 1)
MainWindow.setCentralWidget(self.centralwidget)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.start_button.setToolTip(_translate("MainWindow", "Start The Program"))
self.start_button.setText(_translate("MainWindow", "Start"))
self.Br_button.setToolTip(_translate("MainWindow", "Browse the File Location to Watch on"))
self.Br_button.setText(_translate("MainWindow", "Browse"))
def start_button_click(self):
self.label.setText("Hello")
def browse_button(self):
fileName = QtWidgets.QFileDialog.getExistingDirectory(QtWidgets.QFileDialog,None,"Open Directory",os.getcwd(), QtWidgets.QFileDialog.ShowDirsOnly)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
When I Click on the Browse button it closes the Application abruptly after few seconds and I am Getting This Error Shown below:

Answer 1

Try it:
import sys
import os
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
class Form(QMainWindow):
def __init__(self,parent=None):
super().__init__(parent)
self.plainTextEdit = QPlainTextEdit()
self.plainTextEdit.setFont(QFont('Arial', 11))
openDirButton = QPushButton("Open Directory")
openDirButton.clicked.connect(self.browse_button)
layoutV = QVBoxLayout()
layoutV.addWidget(openDirButton)
layoutH = QHBoxLayout()
layoutH.addLayout(layoutV)
layoutH.addWidget(self.plainTextEdit)
centerWidget = QWidget()
centerWidget.setLayout(layoutH)
self.setCentralWidget(centerWidget)
def browse_button(self):
fileName = QFileDialog.getExistingDirectory(
#QtWidgets.QFileDialog, # ???
None,
"Open Directory",
os.getcwd(),
QFileDialog.ShowDirsOnly)
self.plainTextEdit.appendHtml("<br>Chose a folder: <b>{}</b>".format(fileName))
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Form()
ex.resize(740,480)
ex.setWindowTitle("PyQt5-QFileDialog")
ex.show()
sys.exit(app.exec_())