ui_mainwindow' object has no attribute 'connect' - python

I am new to PyQt. I want the GUI to be GUI1 from time 0 to time t1, GUI2 from time t1 to t2, ..., GUIn from time t(n-1) to t(n). So I thought I would have to use the multithreading techniques. Does anyone have available code that has the same function as my requirement?
Moreover, I met some problem when I try connect the thread's finished signal to the UpdateUI function. The code is shown below:
class Ui_MainWindow(QtCore.QObject):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(771, 586)
MainWindow.setMinimumSize(QtCore.QSize(771, 586))
font = QtGui.QFont()
font.setFamily(_fromUtf8("Arial"))
MainWindow.setFont(font)
#Feng
self.centralWidget = QtGui.QWidget(MainWindow)
self.centralWidget.setObjectName(_fromUtf8("centralWidget"))
self.layoutWidget = QtGui.QWidget(self.centralWidget)
self.layoutWidget.setGeometry(QtCore.QRect(10, 500, 751, 27))
self.layoutWidget.setObjectName(_fromUtf8("layoutWidget"))
self.horizontalLayout = QtGui.QHBoxLayout(self.layoutWidget)
self.horizontalLayout.setSizeConstraint(QtGui.QLayout.SetMinimumSize)
self.horizontalLayout.setMargin(11)
self.horizontalLayout.setSpacing(6)
self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
self.btnSkip = QtGui.QPushButton(self.layoutWidget)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.btnSkip.sizePolicy().hasHeightForWidth())
self.btnSkip.setSizePolicy(sizePolicy)
self.btnSkip.setMinimumSize(QtCore.QSize(0, 23))
self.btnSkip.setFlat(False)
self.btnSkip.setObjectName(_fromUtf8("btnSkip"))
self.horizontalLayout.addWidget(self.btnSkip)
self.horizontalSlider = QtGui.QSlider(self.layoutWidget)
self.horizontalSlider.setMinimumSize(QtCore.QSize(0, 22))
self.horizontalSlider.setOrientation(QtCore.Qt.Horizontal)
self.horizontalSlider.setObjectName(_fromUtf8("horizontalSlider"))
self.horizontalLayout.addWidget(self.horizontalSlider)
self.btnPrevious = QtGui.QPushButton(self.layoutWidget)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.btnPrevious.sizePolicy().hasHeightForWidth())
self.btnPrevious.setSizePolicy(sizePolicy)
self.btnPrevious.setMinimumSize(QtCore.QSize(0, 23))
self.btnPrevious.setObjectName(_fromUtf8("btnPrevious"))
self.horizontalLayout.addWidget(self.btnPrevious)
self.btnNext = QtGui.QPushButton(self.layoutWidget)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.btnNext.sizePolicy().hasHeightForWidth())
self.btnNext.setSizePolicy(sizePolicy)
self.btnNext.setMinimumSize(QtCore.QSize(0, 23))
self.btnNext.setObjectName(_fromUtf8("btnNext"))
self.horizontalLayout.addWidget(self.btnNext)
self.layoutWidget1 = QtGui.QWidget(self.centralWidget)
self.layoutWidget1.setGeometry(QtCore.QRect(11, 11, 751, 171))
self.layoutWidget1.setObjectName(_fromUtf8("layoutWidget1"))
self.verticalLayout = QtGui.QVBoxLayout(self.layoutWidget1)
self.verticalLayout.setMargin(11)
self.verticalLayout.setSpacing(6)
self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
self.textEditTaskName = QtGui.QTextEdit(self.layoutWidget1)
self.textEditTaskName.setEnabled(False)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.textEditTaskName.sizePolicy().hasHeightForWidth())
self.textEditTaskName.setSizePolicy(sizePolicy)
self.textEditTaskName.setMinimumSize(QtCore.QSize(0, 94))
font = QtGui.QFont()
font.setFamily(_fromUtf8("Arial"))
font.setPointSize(18)
font.setBold(True)
font.setWeight(75)
self.textEditTaskName.setFont(font)
self.textEditTaskName.setAcceptDrops(False)
self.textEditTaskName.setFrameShape(QtGui.QFrame.NoFrame)
#Feng
self.textEditTaskName.setText("Welcome")
self.textEditTaskName.setObjectName(_fromUtf8("textEditTaskName"))
self.verticalLayout.addWidget(self.textEditTaskName)
self.textEditTaskdesciption = QtGui.QTextEdit(self.layoutWidget1)
self.textEditTaskdesciption.setEnabled(False)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(1)
sizePolicy.setHeightForWidth(self.textEditTaskdesciption.sizePolicy().hasHeightForWidth())
self.textEditTaskdesciption.setSizePolicy(sizePolicy)
self.textEditTaskdesciption.setMinimumSize(QtCore.QSize(0, 69))
font = QtGui.QFont()
font.setFamily(_fromUtf8("Arial"))
font.setPointSize(12)
self.textEditTaskdesciption.setFont(font)
self.textEditTaskdesciption.setAcceptDrops(False)
#Feng
self.textEditTaskdesciption.setText('Welcome to my program.')
self.textEditTaskdesciption.setFrameShape(QtGui.QFrame.NoFrame)
self.textEditTaskdesciption.setFrameShadow(QtGui.QFrame.Plain)
self.textEditTaskdesciption.setObjectName(_fromUtf8("textEditTaskdesciption"))
self.verticalLayout.addWidget(self.textEditTaskdesciption)
self.layoutWidget2 = QtGui.QWidget(self.centralWidget)
self.layoutWidget2.setGeometry(QtCore.QRect(10, 190, 751, 311))
self.layoutWidget2.setObjectName(_fromUtf8("layoutWidget2"))
self.verticalLayout_2 = QtGui.QVBoxLayout(self.layoutWidget2)
self.verticalLayout_2.setMargin(11)
self.verticalLayout_2.setSpacing(6)
self.verticalLayout_2.setObjectName(_fromUtf8("verticalLayout_2"))
self.labelTESTImage = QtGui.QLabel(self.layoutWidget2)
font = QtGui.QFont()
font.setFamily(_fromUtf8("Arial"))
font.setPointSize(14)
font.setBold(True)
font.setWeight(75)
self.labelTESTImage.setFont(font)
self.labelTESTImage.setAlignment(QtCore.Qt.AlignCenter)
image = QtGui.QImage('Images/deptLogo.png')
#Feng
self.labelTESTImage.setPixmap(QPixmap.fromImage(image))#("deptLogo.png"))
self.labelTESTImage.setScaledContents(True)
self.labelTESTImage.setObjectName(_fromUtf8("labelTESTImage"))
self.labelTESTImage.setScaledContents(True)
#Feng
self.btnNext.pressed.connect(self.nextSession)
self.btnPrevious.pressed.connect(self.previousSession)
#Feng
self.horizontalSlider.setRange(-1,len(strSettings)-1)
self.horizontalSlider.setValue(-1)
self.horizontalSlider.valueChanged.connect(self.dragSlider)
#self.btnNext.clicked.connect(self.readingSettingsFile)
#self.btnNext.clicked.connect(self.loadimage)
self.verticalLayout_2.addWidget(self.labelTESTImage)
self.progressBar = QtGui.QProgressBar(self.layoutWidget2)
self.progressBar.setMinimumSize(QtCore.QSize(0, 22))
self.progressBar.setProperty("value", 24)
self.progressBar.setObjectName(_fromUtf8("progressBar"))
self.progressBar.setVisible(False)
self.verticalLayout_2.addWidget(self.progressBar)
MainWindow.setCentralWidget(self.centralWidget)
self.menuBar = QtGui.QMenuBar(MainWindow)
self.menuBar.setGeometry(QtCore.QRect(0, 0, 771, 21))
self.menuBar.setObjectName(_fromUtf8("menuBar"))
self.menuFile = QtGui.QMenu(self.menuBar)
self.menuFile.setObjectName(_fromUtf8("menuFile"))
self.menuEdit = QtGui.QMenu(self.menuBar)
self.menuEdit.setObjectName(_fromUtf8("menuEdit"))
self.menuHelp = QtGui.QMenu(self.menuBar)
self.menuHelp.setObjectName(_fromUtf8("menuHelp"))
MainWindow.setMenuBar(self.menuBar)
self.mainToolBar = QtGui.QToolBar(MainWindow)
self.mainToolBar.setObjectName(_fromUtf8("mainToolBar"))
MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.mainToolBar)
self.statusBar = QtGui.QStatusBar(MainWindow)
self.statusBar.setObjectName(_fromUtf8("statusBar"))
MainWindow.setStatusBar(self.statusBar)
self.menuBar.addAction(self.menuFile.menuAction())
self.menuBar.addAction(self.menuEdit.menuAction())
self.menuBar.addAction(self.menuHelp.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "my test", None))
MainWindow.setWindowIcon(QtGui.QIcon('Images/test.ico'))
self.btnSkip.setText(_translate("MainWindow", "Skip", None))
self.btnPrevious.setText(_translate("MainWindow", "&Previous", None))
self.btnNext.setText(_translate("MainWindow", "&Next", None))
#self.labelTESTImage.setText(_translate("MainWindow", "my test", None))
self.menuFile.setTitle(_translate("MainWindow", "File", None))
self.menuEdit.setTitle(_translate("MainWindow", "Edit", None))
self.menuHelp.setTitle(_translate("MainWindow", "Help", None))
#Feng
def dragSlider(self):
global strSettings, timeSleep, lineCurrent
lineCurrent = int(self.horizontalSlider.value())
if (lineCurrent != -1):
line = strSettings[lineCurrent]
wavFilename, showProgressBar, valPauseTime, valName, valDescription, valImageLoad = line.split("\t")
self.time_thread = timerThread(float(valPauseTime))
self.connect(self.time_thread, SIGNAL("finished()"),self, self.updateUIFromFile())
else:
self.btnNext.setText(_translate("MainWindow", "&Start", None))
self.textEditTaskName.setText("Welcome")
self.textEditTaskdesciption.setText('This program is designed by Feng.')
self.labelOTCImage.setPixmap(QPixmap.fromImage(QtGui.QImage('Images/deptLogo.png')))
self.labelOTCImage.setScaledContents(True)
self.progressBar.setVisible(False)
def nextSession(self):
global strSettings, timeSleep, lineCurrent
if(lineCurrent<len(strSettings)-1):
lineCurrent += 1
self.horizontalSlider.setValue(lineCurrent)
#self.updateUIFromFile()
def previousSession(self):
global strSettings, timeSleep, lineCurrent
if lineCurrent>0:
lineCurrent -= 1
else:
lineCurrent = -1
self.horizontalSlider.setValue(lineCurrent)
#self.updateUIFromFile()
def updateUIFromFile(self):
self.btnNext.setText(_translate("MainWindow", "&Next", None))
line = strSettings[lineCurrent]
wavFilename, showProgressBar, valPauseTime, valName, valDescription, valImageLoad = line.split("\t")
self.textEditTaskName.setText(valName)
self.textEditTaskdesciption.setText(valDescription)
self.labelOTCImage.setPixmap(QPixmap.fromImage(QtGui.QImage('resources/'+valImageLoad.replace("\n", ""))))
self.labelOTCImage.setScaledContents(False)
self.progressBar.setVisible(int(showProgressBar))
self.progressBar.setValue(50)
This is the thread class
class timerThread(QtCore.QThread):
def __init__(self,sleepTime):
QtCore.QThread.__init__(self)
self.sleepTime = sleepTime
def __del__(self):
self.wait()
def run(self):
time.sleep(self.sleepTime) # artificial time delay
Main
if __name__ == "__main__":
try:
fileSettings = open('protocol.txt','r')
except IOError as e:
print ("Unable to open file") #Does not exist OR no read permissions
sys.exit(0)
strSettings = fileSettings.readlines()
strSettings = list(filter(None, strSettings))
fileSettings.close()
timeSleep = 0
lineCurrent = -1
app = QtGui.QApplication(sys.argv)
MainWindow = QtGui.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
The file 'protocol.txt' contains the contents for each QtWidget and a timeline for when the GUI would change contents


You're using the Ui_MainWindow class incorrectly. See this answer for how to use the auto-generated UI classes.
You should be either inheriting from the UI class, or setting it as an instance attribute on one of your own classes.
class MainWIndow(QtGui.QMainWIndow,Ui_MainWindow):
def __init__(self, parent=None):
QtGui.QMainWindow.__init__(self, parent)
self.setupUi(self)
Sometimes, people won't inherit, but will assign it to an attribute of the class:
class MainWIndow(QtGui.QMainWIndow):
def __init__(self, parent=None):
QtGui.QMainWIndow.__init__(self, parent)
self.ui = Ui_MainWindow(self)
self.ui.setupUi(self)


So although nobody wants to give the answer to this question, I think I found the answer from another question asked by me in Update GUI at different time interval in QT.
I hope someone could give me the pyqt version of this answer because this is in C++.

Related

Qt5 QComboBox focusOutEvent

I have built a GUI and among other things I am using a QComboBox (drop-down menu) with three entries. I want to enable/disable some other boxes and labels in the GUI, depending on which entry is selected in the QComboBox. I have managed to do that so far.
My problem is that all changes are taken into effect only when I press the "Run" button, which executes the application.
What I want to do is the action of enabling/disabling the relevant boxes will happen once I have selected the entry from the drop-down menu and not waiting until I press the "Run" button.
Is there a way to do something like that? Can I use the focusOutEvent to check when the user has clicked anywhere else than the drop-menu and apply the changes in the other boxes/labels?
I put below the class "controlling" my GUI, but I dont post the actual class generating the GUI because it is too lengthy. If you think it is relevant I can post it. I post instead a picture of the GUI.GUI The boxes and labels in the black circles should be disabled when the "Measuring Mode" drop-box is set to "Cable loss" or "Amplifier". When it is set to "Mixer" they should be enabled. I enable/disable the boxes and labels with an if statement inside the user_input function, in the Window class. The wanted drop-down menu is represeted by the "mode_select" variable.
Edit:
I think my explanation is not very intuitive without the actual gui code so I post it below.
from PyQt5 import QtWidgets, QtCore
from converter import convert_ui
import sys
import os
import time
class Window(QtWidgets.QMainWindow):
def __init__(self):
from transfer_function_gui import Ui_MainWindow
QtWidgets.QMainWindow.__init__(self)
self.ui = Ui_MainWindow()
self.ui.setupUi(self) # setup GUI
self.ui.run_button_PM_tab.clicked.connect(self.user_input)
def user_input(self):
test_mode = self.ui.mode_select.currentText() # type: str
if test_mode == "Mixer":
self.ui.LO_Power_input.setEnabled(True)
self.ui.LO_Power_lbl.setEnabled(True)
self.ui.LO_freq_input.setEnabled(True)
self.ui.LO_freq_lbl.setEnabled(True)
else:
self.ui.LO_Power_input.setEnabled(False)
self.ui.LO_Power_lbl.setEnabled(False)
self.ui.LO_freq_input.setEnabled(False)
self.ui.LO_freq_lbl.setEnabled(False)
############################### Main ###############################
if __name__=='__main__':
convert_ui('transfer_function_gui.ui')
app = QtWidgets.QApplication(sys.argv)
app.setStyle('Fusion')
window = Window()
window.show()
sys.exit(app.exec_())
GUI generation (from Qt designer)
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.setEnabled(True)
MainWindow.resize(770, 613)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.progressBar = QtWidgets.QProgressBar(self.centralwidget)
self.progressBar.setGeometry(QtCore.QRect(10, 520, 630, 30))
self.progressBar.setProperty("value", 0)
self.progressBar.setObjectName("progressBar")
self.Dev_address_frame = QtWidgets.QGroupBox(self.centralwidget)
self.Dev_address_frame.setGeometry(QtCore.QRect(10, 10, 371, 140))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.Dev_address_frame.sizePolicy().hasHeightForWidth())
self.Dev_address_frame.setSizePolicy(sizePolicy)
self.Dev_address_frame.setMinimumSize(QtCore.QSize(0, 100))
font = QtGui.QFont()
font.setPointSize(8)
self.Dev_address_frame.setFont(font)
self.Dev_address_frame.setFlat(False)
self.Dev_address_frame.setCheckable(False)
self.Dev_address_frame.setObjectName("Dev_address_frame")
self.SigGen_label = QtWidgets.QLabel(self.Dev_address_frame)
self.SigGen_label.setGeometry(QtCore.QRect(20, 30, 100, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Maximum, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.SigGen_label.sizePolicy().hasHeightForWidth())
self.SigGen_label.setSizePolicy(sizePolicy)
self.SigGen_label.setObjectName("SigGen_label")
self.PM_label = QtWidgets.QLabel(self.Dev_address_frame)
self.PM_label.setGeometry(QtCore.QRect(20, 70, 100, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.PM_label.sizePolicy().hasHeightForWidth())
self.PM_label.setSizePolicy(sizePolicy)
self.PM_label.setObjectName("PM_label")
self.SigGen_addr_input = QtWidgets.QLineEdit(self.Dev_address_frame)
self.SigGen_addr_input.setGeometry(QtCore.QRect(120, 30, 180, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.SigGen_addr_input.sizePolicy().hasHeightForWidth())
self.SigGen_addr_input.setSizePolicy(sizePolicy)
self.SigGen_addr_input.setObjectName("SigGen_addr_input")
self.PM_addr_input = QtWidgets.QLineEdit(self.Dev_address_frame)
self.PM_addr_input.setGeometry(QtCore.QRect(120, 70, 180, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.PM_addr_input.sizePolicy().hasHeightForWidth())
self.PM_addr_input.setSizePolicy(sizePolicy)
self.PM_addr_input.setObjectName("PM_addr_input")
self.PM_cnct_checkBox = QtWidgets.QCheckBox(self.Dev_address_frame)
self.PM_cnct_checkBox.setEnabled(False)
self.PM_cnct_checkBox.setGeometry(QtCore.QRect(240, 105, 16, 20))
self.PM_cnct_checkBox.setText("")
self.PM_cnct_checkBox.setObjectName("PM_cnct_checkBox")
self.PM_cnct_lbl = QtWidgets.QLabel(self.Dev_address_frame)
self.PM_cnct_lbl.setEnabled(False)
self.PM_cnct_lbl.setGeometry(QtCore.QRect(20, 105, 210, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.PM_cnct_lbl.sizePolicy().hasHeightForWidth())
self.PM_cnct_lbl.setSizePolicy(sizePolicy)
self.PM_cnct_lbl.setObjectName("PM_cnct_lbl")
self.Freq_setup_frame = QtWidgets.QGroupBox(self.centralwidget)
self.Freq_setup_frame.setGeometry(QtCore.QRect(10, 200, 370, 181))
font = QtGui.QFont()
font.setPointSize(8)
self.Freq_setup_frame.setFont(font)
self.Freq_setup_frame.setFlat(False)
self.Freq_setup_frame.setCheckable(False)
self.Freq_setup_frame.setObjectName("Freq_setup_frame")
self.Start_freq_lbl = QtWidgets.QLabel(self.Freq_setup_frame)
self.Start_freq_lbl.setEnabled(True)
self.Start_freq_lbl.setGeometry(QtCore.QRect(20, 30, 100, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.Start_freq_lbl.sizePolicy().hasHeightForWidth())
self.Start_freq_lbl.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setPointSize(8)
self.Start_freq_lbl.setFont(font)
self.Start_freq_lbl.setMidLineWidth(0)
self.Start_freq_lbl.setText("Start freq. ")
self.Start_freq_lbl.setObjectName("Start_freq_lbl")
self.Stop_freq_lbl = QtWidgets.QLabel(self.Freq_setup_frame)
self.Stop_freq_lbl.setGeometry(QtCore.QRect(20, 70, 100, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.Stop_freq_lbl.setFont(font)
self.Stop_freq_lbl.setObjectName("Stop_freq_lbl")
self.Step_freq_lbl = QtWidgets.QLabel(self.Freq_setup_frame)
self.Step_freq_lbl.setGeometry(QtCore.QRect(20, 110, 100, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.Step_freq_lbl.setFont(font)
self.Step_freq_lbl.setObjectName("Step_freq_lbl")
self.StopFreq_input = QtWidgets.QLineEdit(self.Freq_setup_frame)
self.StopFreq_input.setGeometry(QtCore.QRect(120, 70, 180, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.StopFreq_input.setFont(font)
self.StopFreq_input.setText("")
self.StopFreq_input.setObjectName("StopFreq_input")
self.Start_freq_input = QtWidgets.QLineEdit(self.Freq_setup_frame)
self.Start_freq_input.setGeometry(QtCore.QRect(120, 30, 180, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.Start_freq_input.sizePolicy().hasHeightForWidth())
self.Start_freq_input.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setPointSize(8)
self.Start_freq_input.setFont(font)
self.Start_freq_input.setText("")
self.Start_freq_input.setObjectName("Start_freq_input")
self.StepFreq_input = QtWidgets.QLineEdit(self.Freq_setup_frame)
self.StepFreq_input.setGeometry(QtCore.QRect(120, 110, 180, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.StepFreq_input.setFont(font)
self.StepFreq_input.setText("")
self.StepFreq_input.setObjectName("StepFreq_input")
self.freq_units_select = QtWidgets.QComboBox(self.Freq_setup_frame)
self.freq_units_select.setGeometry(QtCore.QRect(310, 29, 51, 141))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.freq_units_select.sizePolicy().hasHeightForWidth())
self.freq_units_select.setSizePolicy(sizePolicy)
self.freq_units_select.setMinimumSize(QtCore.QSize(0, 70))
font = QtGui.QFont()
font.setPointSize(8)
self.freq_units_select.setFont(font)
self.freq_units_select.setInsertPolicy(QtWidgets.QComboBox.InsertAtBottom)
self.freq_units_select.setSizeAdjustPolicy(QtWidgets.QComboBox.AdjustToContentsOnFirstShow)
self.freq_units_select.setFrame(True)
self.freq_units_select.setObjectName("freq_units_select")
self.freq_units_select.addItem("")
self.freq_units_select.addItem("")
self.freq_units_select.addItem("")
self.LO_freq_lbl = QtWidgets.QLabel(self.Freq_setup_frame)
self.LO_freq_lbl.setGeometry(QtCore.QRect(20, 150, 100, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.LO_freq_lbl.setFont(font)
self.LO_freq_lbl.setObjectName("LO_freq_lbl")
self.LO_freq_input = QtWidgets.QLineEdit(self.Freq_setup_frame)
self.LO_freq_input.setGeometry(QtCore.QRect(120, 150, 180, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.LO_freq_input.setFont(font)
self.LO_freq_input.setText("")
self.LO_freq_input.setObjectName("LO_freq_input")
self.Power_setup_frame = QtWidgets.QGroupBox(self.centralwidget)
self.Power_setup_frame.setGeometry(QtCore.QRect(10, 390, 370, 111))
font = QtGui.QFont()
font.setPointSize(8)
self.Power_setup_frame.setFont(font)
self.Power_setup_frame.setFlat(False)
self.Power_setup_frame.setCheckable(False)
self.Power_setup_frame.setObjectName("Power_setup_frame")
self.DUT_input_lbl = QtWidgets.QLabel(self.Power_setup_frame)
self.DUT_input_lbl.setGeometry(QtCore.QRect(20, 30, 100, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.DUT_input_lbl.setFont(font)
self.DUT_input_lbl.setObjectName("DUT_input_lbl")
self.LO_Power_lbl = QtWidgets.QLabel(self.Power_setup_frame)
self.LO_Power_lbl.setGeometry(QtCore.QRect(20, 70, 100, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.LO_Power_lbl.setFont(font)
self.LO_Power_lbl.setObjectName("LO_Power_lbl")
self.DUT_Input_power_input = QtWidgets.QLineEdit(self.Power_setup_frame)
self.DUT_Input_power_input.setGeometry(QtCore.QRect(120, 30, 180, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.DUT_Input_power_input.setFont(font)
self.DUT_Input_power_input.setText("")
self.DUT_Input_power_input.setObjectName("DUT_Input_power_input")
self.LO_Power_input = QtWidgets.QLineEdit(self.Power_setup_frame)
self.LO_Power_input.setGeometry(QtCore.QRect(120, 70, 180, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.LO_Power_input.setFont(font)
self.LO_Power_input.setText("")
self.LO_Power_input.setObjectName("LO_Power_input")
self.LO_dBm = QtWidgets.QLabel(self.Power_setup_frame)
self.LO_dBm.setGeometry(QtCore.QRect(320, 70, 20, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.LO_dBm.setFont(font)
self.LO_dBm.setObjectName("LO_dBm")
self.DUT_dBm = QtWidgets.QLabel(self.Power_setup_frame)
self.DUT_dBm.setGeometry(QtCore.QRect(320, 30, 20, 20))
font = QtGui.QFont()
font.setPointSize(8)
self.DUT_dBm.setFont(font)
self.DUT_dBm.setObjectName("DUT_dBm")
self.mode_label = QtWidgets.QLabel(self.centralwidget)
self.mode_label.setGeometry(QtCore.QRect(30, 165, 100, 20))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.mode_label.sizePolicy().hasHeightForWidth())
self.mode_label.setSizePolicy(sizePolicy)
self.mode_label.setBaseSize(QtCore.QSize(0, 0))
self.mode_label.setObjectName("mode_label")
self.mode_select = QtWidgets.QComboBox(self.centralwidget)
self.mode_select.setGeometry(QtCore.QRect(130, 165, 180, 20))
self.mode_select.setObjectName("mode_select")
self.mode_select.addItem("")
self.mode_select.addItem("")
self.mode_select.addItem("")
self.run_button_PM_tab = QtWidgets.QPushButton(self.centralwidget)
self.run_button_PM_tab.setEnabled(True)
self.run_button_PM_tab.setGeometry(QtCore.QRect(650, 520, 100, 30))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.run_button_PM_tab.sizePolicy().hasHeightForWidth())
self.run_button_PM_tab.setSizePolicy(sizePolicy)
self.run_button_PM_tab.setMinimumSize(QtCore.QSize(0, 0))
self.run_button_PM_tab.setLayoutDirection(QtCore.Qt.LeftToRight)
self.run_button_PM_tab.setObjectName("run_button_PM_tab")
self.S21_table = QtWidgets.QTableWidget(self.centralwidget)
self.S21_table.setGeometry(QtCore.QRect(400, 10, 360, 490))
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Minimum)
sizePolicy.setHorizontalStretch(33)
sizePolicy.setVerticalStretch(25)
sizePolicy.setHeightForWidth(self.S21_table.sizePolicy().hasHeightForWidth())
self.S21_table.setSizePolicy(sizePolicy)
self.S21_table.setMinimumSize(QtCore.QSize(15, 35))
self.S21_table.setSizeIncrement(QtCore.QSize(0, 0))
self.S21_table.setBaseSize(QtCore.QSize(0, 0))
self.S21_table.setObjectName("S21_table")
self.S21_table.setColumnCount(2)
self.S21_table.setRowCount(1)
item = QtWidgets.QTableWidgetItem()
self.S21_table.setVerticalHeaderItem(0, item)
item = QtWidgets.QTableWidgetItem()
item.setTextAlignment(QtCore.Qt.AlignCenter)
self.S21_table.setHorizontalHeaderItem(0, item)
item = QtWidgets.QTableWidgetItem()
self.S21_table.setHorizontalHeaderItem(1, item)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 770, 21))
self.menubar.setObjectName("menubar")
self.menuFile = QtWidgets.QMenu(self.menubar)
self.menuFile.setObjectName("menuFile")
self.menuAbout = QtWidgets.QMenu(self.menubar)
self.menuAbout.setObjectName("menuAbout")
self.menuPreferences = QtWidgets.QMenu(self.menubar)
self.menuPreferences.setObjectName("menuPreferences")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.actionSave_as = QtWidgets.QAction(MainWindow)
self.actionSave_as.setObjectName("actionSave_as")
self.actionExit = QtWidgets.QAction(MainWindow)
self.actionExit.setObjectName("actionExit")
self.menuFile.addAction(self.actionSave_as)
self.menuFile.addAction(self.actionExit)
self.menubar.addAction(self.menuFile.menuAction())
self.menubar.addAction(self.menuPreferences.menuAction())
self.menubar.addAction(self.menuAbout.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "Transfer Function Calculator v0.5"))
self.Dev_address_frame.setTitle(_translate("MainWindow", "Device addresses (GPIB, USB, TCPIP)"))
self.SigGen_label.setText(_translate("MainWindow", "Signal Generator"))
self.PM_label.setText(_translate("MainWindow", "Power Meter"))
self.PM_cnct_lbl.setText(_translate("MainWindow", "If PM is connected to SigGen check the box"))
self.Freq_setup_frame.setTitle(_translate("MainWindow", "Frequency setup"))
self.Stop_freq_lbl.setText(_translate("MainWindow", "Stop freq."))
self.Step_freq_lbl.setText(_translate("MainWindow", "Step freq."))
self.freq_units_select.setCurrentText(_translate("MainWindow", "kHz"))
self.freq_units_select.setItemText(0, _translate("MainWindow", "kHz"))
self.freq_units_select.setItemText(1, _translate("MainWindow", "MHz"))
self.freq_units_select.setItemText(2, _translate("MainWindow", "GHz"))
self.LO_freq_lbl.setText(_translate("MainWindow", "LO freq."))
self.Power_setup_frame.setTitle(_translate("MainWindow", "Power setup"))
self.DUT_input_lbl.setText(_translate("MainWindow", "DUT Input power"))
self.LO_Power_lbl.setText(_translate("MainWindow", "LO Power"))
self.LO_dBm.setText(_translate("MainWindow", "dBm"))
self.DUT_dBm.setText(_translate("MainWindow", "dBm"))
self.mode_label.setText(_translate("MainWindow", "Measuring mode"))
self.mode_select.setItemText(0, _translate("MainWindow", "Cable loss"))
self.mode_select.setItemText(1, _translate("MainWindow", "Amplifier"))
self.mode_select.setItemText(2, _translate("MainWindow", "Mixer"))
self.run_button_PM_tab.setText(_translate("MainWindow", "Run"))
item = self.S21_table.verticalHeaderItem(0)
item.setText(_translate("MainWindow", "New Row"))
item = self.S21_table.horizontalHeaderItem(0)
item.setText(_translate("MainWindow", "New Column"))
item = self.S21_table.horizontalHeaderItem(1)
item.setText(_translate("MainWindow", "New Column"))
self.menuFile.setTitle(_translate("MainWindow", "File"))
self.menuAbout.setTitle(_translate("MainWindow", "About"))
self.menuPreferences.setTitle(_translate("MainWindow", "Settings..."))
self.actionSave_as.setText(_translate("MainWindow", "Save as..."))
self.actionExit.setText(_translate("MainWindow", "Exit"))

QComboBox uses these signals here which you can connect using signals and slots.
I think the one you would want to use is either currentTextChanged or currentIndexChanged. So you could do something like this in your init:
class Window(QtWidgets.QMainWindow):
def __init__(self):
from transfer_function_gui import Ui_MainWindow
QtWidgets.QMainWindow.__init__(self)
self.ui = Ui_MainWindow()
self.ui.setupUi(self) # setup GUI
self.ui.run_button_PM_tab.clicked.connect(self.user_input)
self.ui.freq_units_select.currentIndexChanged.connect(self.user_input)
self.ui.mode_select.currentIndexChanged.connect(self.user_input)
This will connect the event of the QComboBox changing it's selected index to a method called self.user_input.

How pass data from second window to main?

I have a python app that change mac address with pyqt5 GUI. I have two python files. The main python file (mainWindow.py) that run main program then I press button to open the second window from second python file secondWindow.py. In second python file opens a window entry then I have to put letters and numbers like then I have to pass data in the first main app label window.
Can anyone help me to solve that?
I tried to reduce code.
mainWindow.py
#!/usr/bin/python3
import os
import sys
import subprocess
from PyQt5 import QtCore, QtGui, QtWidgets
from secondWindow import Ui_macSpecific
import macspoof_bash
import settings
macspoof_bash.write_to_ini()
# Read and write settings in macspoof.ini file
from configparser import ConfigParser
# instantiate
config = ConfigParser()
# parse existing file
config.read('/home/user/.config/macspoof/macspoof.ini')
# read values from a section
wired = config.get('ethernet', 'wired')
wireless = config.get('wifi', 'wireless')
class Ui_MainWindow(object):
def specificWindow(self):
self.window = QtWidgets.QDialog()
self.ui = Ui_macSpecific()
#self.ui.setupUi(self.window)
self.ui.setupUi(self.window, self) # <--- assign MainWindow as parent to second window
self.window.show()
def aboutWindow(self):
self.aboutWindow = QtWidgets.QDialog()
self.ui = Ui_Dialog()
self.ui.setupUi(self.aboutWindow)
self.aboutWindow.show()
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(480, 400)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName("gridLayout")
self.label_3 = QtWidgets.QLabel(self.centralwidget)
self.label_3.setStyleSheet("background-color: rgb(36, 31, 49);\n"
"font: 11pt \"DejaVu Sans\";\n"
"color: rgb(246, 245, 244);")
self.label_3.setAlignment(QtCore.Qt.AlignCenter)
self.label_3.setObjectName("label_3")
self.gridLayout.addWidget(self.label_3, 1, 0, 1, 1)
self.pushButton_6 = QtWidgets.QPushButton(self.centralwidget, clicked = lambda: self.specificWindow())
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_6.sizePolicy().hasHeightForWidth())
self.pushButton_6.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setFamily("DejaVu Sans")
font.setPointSize(10)
self.pushButton_6.setFont(font)
self.pushButton_6.setObjectName("pushButton_6")
self.gridLayout.addWidget(self.pushButton_6, 4, 1, 1, 1)
self.pushButton = QtWidgets.QPushButton(self.centralwidget, clicked = lambda: self.button_vendor_wired())
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton.sizePolicy().hasHeightForWidth())
self.pushButton.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setFamily("DejaVu Sans")
font.setPointSize(10)
self.pushButton.setFont(font)
self.pushButton.setObjectName("pushButton")
self.gridLayout.addWidget(self.pushButton, 2, 0, 1, 1)
self.pushButton_3 = QtWidgets.QPushButton(self.centralwidget, clicked = lambda: self.button_fully_wired())
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_3.sizePolicy().hasHeightForWidth())
self.pushButton_3.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setFamily("DejaVu Sans")
font.setPointSize(10)
self.pushButton_3.setFont(font)
self.pushButton_3.setObjectName("pushButton_3")
self.gridLayout.addWidget(self.pushButton_3, 3, 0, 1, 1)
self.pushButton_8 = QtWidgets.QPushButton(self.centralwidget, clicked = lambda: self.button_original_wireless())
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_8.sizePolicy().hasHeightForWidth())
self.pushButton_8.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setFamily("DejaVu Sans")
font.setPointSize(10)
self.pushButton_8.setFont(font)
self.pushButton_8.setLayoutDirection(QtCore.Qt.LeftToRight)
self.pushButton_8.setAutoFillBackground(False)
self.pushButton_8.setObjectName("pushButton_8")
self.gridLayout.addWidget(self.pushButton_8, 5, 1, 1, 1)
self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget, clicked = lambda: self.button_vendor_wireless())
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_2.sizePolicy().hasHeightForWidth())
self.pushButton_2.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setFamily("DejaVu Sans")
font.setPointSize(10)
self.pushButton_2.setFont(font)
self.pushButton_2.setObjectName("pushButton_2")
self.gridLayout.addWidget(self.pushButton_2, 2, 1, 1, 1)
self.pushButton_7 = QtWidgets.QPushButton(self.centralwidget, clicked = lambda: self.button_original_wired())
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_7.sizePolicy().hasHeightForWidth())
self.pushButton_7.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setFamily("DejaVu Sans")
font.setPointSize(10)
self.pushButton_7.setFont(font)
self.pushButton_7.setObjectName("pushButton_7")
self.gridLayout.addWidget(self.pushButton_7, 5, 0, 1, 1)
self.pushButton_5 = QtWidgets.QPushButton(self.centralwidget, clicked = lambda: self.specificWindow())
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_5.sizePolicy().hasHeightForWidth())
self.pushButton_5.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setFamily("DejaVu Sans")
font.setPointSize(10)
self.pushButton_5.setFont(font)
self.pushButton_5.setObjectName("pushButton_5")
self.gridLayout.addWidget(self.pushButton_5, 4, 0, 1, 1)
self.label_4 = QtWidgets.QLabel(self.centralwidget)
self.label_4.setStyleSheet("background-color: rgb(36, 31, 49);\n"
"font: 11pt \"DejaVu Sans\";\n"
"color: rgb(246, 245, 244);")
self.label_4.setObjectName("label_4")
self.label_4.setAlignment(QtCore.Qt.AlignCenter)
self.gridLayout.addWidget(self.label_4, 1, 1, 1, 1)
self.pushButton_4 = QtWidgets.QPushButton(self.centralwidget, clicked = lambda: self.button_fully_wireless())
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_4.sizePolicy().hasHeightForWidth())
self.pushButton_4.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setFamily("DejaVu Sans")
font.setPointSize(10)
self.pushButton_4.setFont(font)
self.pushButton_4.setObjectName("pushButton_4")
self.gridLayout.addWidget(self.pushButton_4, 3, 1, 1, 1)
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setMinimumSize(QtCore.QSize(0, 0))
self.label.setSizeIncrement(QtCore.QSize(0, 0))
self.label.setStyleSheet("background-color: rgb(36, 31, 49);\n"
"font: 11pt \"DejaVu Sans\";\n"
"color: rgb(246, 245, 244);")
self.label.setAlignment(QtCore.Qt.AlignCenter)
self.label.setObjectName("label")
self.gridLayout.addWidget(self.label, 0, 0, 1, 1)
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setStyleSheet("background-color: rgb(36, 31, 49);\n"
"font: 11pt \"DejaVu Sans\";\n"
"color: rgb(246, 245, 244);")
self.label_2.setObjectName("label_2")
self.label_2.setAlignment(QtCore.Qt.AlignCenter)
self.gridLayout.addWidget(self.label_2, 0, 1, 1, 1)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 480, 20))
self.menubar.setObjectName("menubar")
self.menuFile = QtWidgets.QMenu(self.menubar)
self.menuFile.setObjectName("menuFile")
self.menuEdit = QtWidgets.QMenu(self.menubar)
self.menuEdit.setObjectName("menuEdit")
self.menuHelp = QtWidgets.QMenu(self.menubar)
self.menuHelp.setObjectName("menuHelp")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.actionExit = QtWidgets.QAction(MainWindow)
self.actionExit.triggered.connect(lambda: self.close_window())
self.actionExit.setObjectName("actionExit")
self.actionPreferences = QtWidgets.QAction(MainWindow)
self.actionPreferences.setObjectName("actionPreferences")
self.actionAbout = QtWidgets.QAction(MainWindow)
self.actionAbout.triggered.connect(lambda: self.aboutWindow())
self.actionAbout.setObjectName("actionAbout")
self.menuFile.addAction(self.actionExit)
self.menuEdit.addAction(self.actionPreferences)
self.menuHelp.addAction(self.actionAbout)
self.menubar.addAction(self.menuFile.menuAction())
self.menubar.addAction(self.menuEdit.menuAction())
self.menubar.addAction(self.menuHelp.menuAction())
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
self.update_wired_label(MainWindow)
self.update_wired_mac_address_label(MainWindow)
self.update_wireless_label(MainWindow)
self.update_wireless_mac_address_label(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MAC address spoofing"))
self.label_3.setText(_translate("MainWindow", "TextLabel"))
self.pushButton_6.setText(_translate("MainWindow", "Set the MAC"))
self.pushButton.setText(_translate("MainWindow", "Don\'t change vendor bytes"))
self.pushButton_3.setText(_translate("MainWindow", "Set fully random MAC"))
self.pushButton_8.setText(_translate("MainWindow", "Reset MAC address to its original"))
self.pushButton_2.setText(_translate("MainWindow", "Don\'t change vendor bytes"))
self.pushButton_7.setText(_translate("MainWindow", "Reset MAC address to its original"))
self.pushButton_5.setText(_translate("MainWindow", "Set the MAC"))
self.label_4.setText(_translate("MainWindow", "TextLabel"))
self.pushButton_4.setText(_translate("MainWindow", "Set fully random MAC"))
self.label.setText(_translate("MainWindow", "TextLabel"))
self.label_2.setText(_translate("MainWindow", "TextLabel"))
self.menuFile.setTitle(_translate("MainWindow", "File"))
self.menuEdit.setTitle(_translate("MainWindow", "Settings"))
self.menuHelp.setTitle(_translate("MainWindow", "Help"))
self.actionExit.setText(_translate("MainWindow", "Exit"))
self.actionPreferences.setText(_translate("MainWindow", "Preferences"))
self.actionAbout.setText(_translate("MainWindow", "About"))
def update_wired_label(self, MainWindow):
print('update_wired_label')
self.wired = config.get('ethernet', 'wired')
self.label.setText(str(self.wired))
def update_wired_mac_address_label(self, MainWindow):
print('update_wired_mac_address_label')
config.read('/home/user/.config/macspoof/macspoof.ini')
self.wired_mac_address = config.get('ethernet', 'wired_mac_address')
self.label_3.setText(str(self.wired_mac_address))
def update_wireless_label(self, MainWindow):
print('update_wireless_label')
self.wireless = config.get('wifi', 'wireless')
self.label_2.setText(str(self.wireless))
def update_wireless_mac_address_label(self, MainWindow):
print('update_wireless_mac_address_label')
config.read('/home/user/.config/macspoof/macspoof.ini')
self.wireless_mac_address = config.get('wifi', 'wireless_mac_address')
self.label_4.setText(str(self.wireless_mac_address))
def button_vendor_wired(self):
print('vendor_wired')
subprocess.run(['macchanger', '-e', wired])
macspoof_bash.vendor_wired()
self.update_wired_mac_address_label(MainWindow)
def button_fully_wired(self):
print('fully wired')
subprocess.run(['macchanger', '-r', wired])
macspoof_bash.write_to_ini()
self.update_wired_mac_address_label(MainWindow)
#def button_specific_wired(self):
# print('specific wired')
# subprocess.run(["macchanger", "-m", wired])
def button_original_wired(self):
print('original wired')
subprocess.run(['macchanger', '-p', wired])
macspoof_bash.write_to_ini()
self.update_wired_mac_address_label(MainWindow)
def button_vendor_wireless(self):
print('vendor_wireless')
subprocess.run(['macchanger', '-e', wireless])
macspoof_bash.vendor_wireless()
self.update_wireless_mac_address_label(MainWindow)
def button_fully_wireless(self):
print('fully wireless')
#wireless = config.get("wifi", "wireless")
#subprocess.run(['macchanger', '-r', wired])
macspoof_bash.fully_wireless()
self.update_wireless_mac_address_label(MainWindow)
def button_specific_wireless(self):
print('specific wired')
subprocess.run(["macchanger", "-m", wireless])
def button_original_wireless(self):
print('original wireless')
subprocess.run(['macchanger', '-p', wireless])
macspoof_bash.write_to_ini()
self.update_wireless_mac_address_label(MainWindow)
def close_window(self):
print("Quit")
sys.exit()
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_())
secondWindow.py
from PyQt5 import QtCore, QtGui, QtWidgets
# Read and write settings in macspoof.ini file
from configparser import ConfigParser
# instantiate
config = ConfigParser()
# parse existing file
config.read('macspoof.ini')
# read values from a section
wired = config.get('ethernet', 'wired')
wired_mac_address = config.get('ethernet', 'wired_mac_address')
class Ui_macSpecific(object):
def setupUi(self, macSpecific, parent): # <--- add extra parameter parent
self.parent = parent # < --- create new attribute parent
#def setupUi(self, macSpecific):
macSpecific.setObjectName("macSpecific")
macSpecific.resize(301, 140)
self.gridLayout = QtWidgets.QGridLayout(macSpecific)
self.gridLayout.setObjectName("gridLayout")
self.label = QtWidgets.QLabel(macSpecific)
font = QtGui.QFont()
font.setFamily("DejaVu Sans")
font.setPointSize(10)
self.label.setFont(font)
self.label.setAlignment(QtCore.Qt.AlignCenter)
self.label.setObjectName("label")
self.gridLayout.addWidget(self.label, 0, 0, 1, 1)
self.lineEdit = QtWidgets.QLineEdit(macSpecific)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.lineEdit.sizePolicy().hasHeightForWidth())
self.lineEdit.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setFamily("DejaVu Sans")
font.setPointSize(14)
self.lineEdit.setFont(font)
self.lineEdit.setLayoutDirection(QtCore.Qt.LeftToRight)
self.lineEdit.setAutoFillBackground(False)
self.lineEdit.setAlignment(QtCore.Qt.AlignCenter)
self.lineEdit.setObjectName("lineEdit")
self.gridLayout.addWidget(self.lineEdit, 1, 0, 1, 1)
self.pushButton = QtWidgets.QPushButton(macSpecific, clicked = lambda: self.submit())
self.pushButton.setObjectName("pushButton")
self.gridLayout.addWidget(self.pushButton, 2, 0, 1, 1)
self.retranslateUi(macSpecific)
QtCore.QMetaObject.connectSlotsByName(macSpecific)
def retranslateUi(self, macSpecific):
_translate = QtCore.QCoreApplication.translate
macSpecific.setWindowTitle(_translate("macSpecific", "MAC address spoofing"))
self.label.setText(_translate("macSpecific", "Enter A MAC address"))
self.lineEdit.setText(_translate("macSpecific", "11:22:33:44:55:66"))
self.pushButton.setText(_translate("macSpecific", "Submit"))
def submit(self):
print("submit")
#self.parent.label_3.setText(str(self.wired_mac_address)) # use parent to set label text
self.parent.label_3.setText(str(self.parent.wired_mac_address)) # <-----Try this then.
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
macSpecific = QtWidgets.QDialog()
ui = Ui_macSpecific()
ui.setupUi(macSpecific)
macSpecific.show()
sys.exit(app.exec_())

One solution would be to assign the MainWindow as the parent of the SecondWindow. Then to get the label text all the SecondWindow has to do is self.parent.label.setText('something'). See the minor adjustments I made below.
mainWindow.py
class Ui_MainWindow(object):
def specificWindow(self):
self.window = QtWidgets.QDialog()
self.ui = Ui_macSpecific()
self.ui.setupUi(self.window, self) # <--- assign MainWindow as parent to second window
self.window.show()
secondWindow.py
import macspoof_bash
class Ui_macSpecific(object):
def setupUi(self, macSpecific, master):
self.master = master
self.window = macSpecific
macSpecific.setObjectName("macSpecific")
macSpecific.resize(301, 140)
...
...
self.pushButton = QtWidgets.QPushButton(macSpecific, clicked = lambda: self.submit())
def submit(self):
print("submit")
text = self.lineEdit.text()
self.master.label_3.setText(text)
self.window.close()
config['ethernet']['wired_mac_address'] = text
with open("macspoof.ini", "w") as inifile:
config.write(inifile)

.UI converted to .Py falls in PyInstaller application

I try to release python application, that uses Qt gui. To deploy app in fast and python-free way i used Pyinstaller
I converted my UI to py.
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(362, 669)
self.centralwidget = QtWidgets.QWidget(MainWindow)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(1)
sizePolicy.setVerticalStretch(1)
sizePolicy.setHeightForWidth(self.centralwidget.sizePolicy().hasHeightForWidth())
self.centralwidget.setSizePolicy(sizePolicy)
self.centralwidget.setAutoFillBackground(True)
self.centralwidget.setObjectName("centralwidget")
self.verticalLayoutWidget = QtWidgets.QWidget(self.centralwidget)
self.verticalLayoutWidget.setGeometry(QtCore.QRect(0, 0, 361, 671))
self.verticalLayoutWidget.setObjectName("verticalLayoutWidget")
self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalLayoutWidget)
self.verticalLayout.setSizeConstraint(QtWidgets.QLayout.SetMaximumSize)
self.verticalLayout.setContentsMargins(2, 2, 2, 2)
self.verticalLayout.setObjectName("verticalLayout")
self.verticalLayout_2 = QtWidgets.QVBoxLayout()
self.verticalLayout_2.setObjectName("verticalLayout_2")
self.horizontalLayout = QtWidgets.QHBoxLayout()
self.horizontalLayout.setObjectName("horizontalLayout")
self.pshBtnSetInput = QtWidgets.QPushButton(self.verticalLayoutWidget)
self.pshBtnSetInput.setObjectName("pshBtnSetInput")
self.horizontalLayout.addWidget(self.pshBtnSetInput)
self.lineEdit = QtWidgets.QLineEdit(self.verticalLayoutWidget)
self.lineEdit.setObjectName("lineEdit")
self.horizontalLayout.addWidget(self.lineEdit)
self.verticalLayout_2.addLayout(self.horizontalLayout)
self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.pshBtnSetOutput = QtWidgets.QPushButton(self.verticalLayoutWidget)
self.pshBtnSetOutput.setObjectName("pshBtnSetOutput")
self.horizontalLayout_2.addWidget(self.pshBtnSetOutput)
self.lineEdit_2 = QtWidgets.QLineEdit(self.verticalLayoutWidget)
self.lineEdit_2.setObjectName("lineEdit_2")
self.horizontalLayout_2.addWidget(self.lineEdit_2)
self.verticalLayout_2.addLayout(self.horizontalLayout_2)
self.verticalLayout.addLayout(self.verticalLayout_2)
self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
self.horizontalLayout_3.setObjectName("horizontalLayout_3")
self.pshBtnAddAttributes = QtWidgets.QPushButton(self.verticalLayoutWidget)
self.pshBtnAddAttributes.setObjectName("pshBtnAddAttributes")
self.horizontalLayout_3.addWidget(self.pshBtnAddAttributes)
self.pshBtnDelAttribute = QtWidgets.QPushButton(self.verticalLayoutWidget)
self.pshBtnDelAttribute.setObjectName("pshBtnDelAttribute")
self.horizontalLayout_3.addWidget(self.pshBtnDelAttribute)
self.verticalLayout.addLayout(self.horizontalLayout_3)
self.tableView = QtWidgets.QTableView(self.verticalLayoutWidget)
self.tableView.setObjectName("tableView")
self.verticalLayout.addWidget(self.tableView)
self.pshBtnCut = QtWidgets.QPushButton(self.verticalLayoutWidget)
self.pshBtnCut.setObjectName("pshBtnCut")
self.verticalLayout.addWidget(self.pshBtnCut)
MainWindow.setCentralWidget(self.centralwidget)
self.actionOpen = QtWidgets.QAction(MainWindow)
self.actionOpen.setObjectName("actionOpen")
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "Нарезка тайлов"))
self.pshBtnSetInput.setText(_translate("MainWindow", "Входящие"))
self.pshBtnSetOutput.setText(_translate("MainWindow", "Исходящие"))
self.pshBtnAddAttributes.setText(_translate("MainWindow", "Добавить атрибут"))
self.pshBtnDelAttribute.setText(_translate("MainWindow", "Удалить атрибут"))
self.pshBtnCut.setText(_translate("MainWindow", "Нарезать"))
self.actionOpen.setText(_translate("MainWindow", "Open Folder"))
It all works fine in interpreter, it works fine when executed from .py or when i test from spyder. I frozed it with pyinstaller, and it works.
But when i deploy it on any win7 x86 machines it stops working first time i call ui class.
I traced error to call of any member of this class inside the constructor of MainWindow.
class MainForm(QtWidgets.QMainWindow):
"""
Main Form of RasterCutterForm
"""
def __init__(self, parent = None):
try:
QtWidgets.QWidget.__init__(self,parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.DataModel = None
self.DataModel = QtGui.QStandardItemModel(parent = self)
self.DataModel.setHorizontalHeaderLabels(["Атрибут", "Значение"])
print("self.tableView.setModel(self.DataModel)")
self.ui.tableView.setModel(self.DataModel)
print("Init Done.")
except Exception as exc:
print(exc)
Last print( " Set Model " ) is the last executed command.
Any ideas?

I have many actions in toolbar and try to make the font bold for the action which is pressed in PyQt5

I have made a UI which has various actions in three toolbars. I'm trying to make the font of one action bold when it is pressed and released by mouse. I know how to make the font bold one-by-one. But I'm going to add tens of actions in those three toolbars. How would I be able to do this? Can anyone help me?
Thank you very much.
The main function does make the font of action1 bold.
Main function:
from uitest import Ui_MainWindow
from PyQt5.QtWidgets import QMainWindow
class window(QMainWindow):
def __init__(self, parent=None):
super(window, self).__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
myFont = QtGui.QFont()
myFont.setBold(True)
self.ui.Action1.setFont(myFont)
if __name__ == "__main__":
app = QApplication([])
gui = window()
gui.show()
app.exec_()
UI code
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.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(120, 330, 151, 71))
self.pushButton.setObjectName("pushButton")
self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_2.setGeometry(QtCore.QRect(360, 330, 151, 71))
self.pushButton_2.setObjectName("pushButton_2")
self.textEdit = QtWidgets.QTextEdit(self.centralwidget)
self.textEdit.setGeometry(QtCore.QRect(160, 80, 321, 181))
self.textEdit.setObjectName("textEdit")
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.toolBar1 = QtWidgets.QToolBar(MainWindow)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.toolBar1.sizePolicy().hasHeightForWidth())
self.toolBar1.setSizePolicy(sizePolicy)
font = QtGui.QFont()
font.setPointSize(14)
self.toolBar1.setFont(font)
self.toolBar1.setObjectName("toolBar1")
MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.toolBar1)
self.toolBar = QtWidgets.QToolBar(MainWindow)
font = QtGui.QFont()
font.setPointSize(12)
self.toolBar.setFont(font)
self.toolBar.setObjectName("toolBar")
MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.toolBar)
MainWindow.insertToolBarBreak(self.toolBar)
self.toolBar_2 = QtWidgets.QToolBar(MainWindow)
font = QtGui.QFont()
font.setPointSize(10)
self.toolBar_2.setFont(font)
self.toolBar_2.setObjectName("toolBar_2")
MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.toolBar_2)
MainWindow.insertToolBarBreak(self.toolBar_2)
self.Action1 = QtWidgets.QAction(MainWindow)
self.Action1.setObjectName("Action1")
self.Action2 = QtWidgets.QAction(MainWindow)
self.Action2.setObjectName("Action2")
self.Action3 = QtWidgets.QAction(MainWindow)
self.Action3.setObjectName("Action3")
self.Action4 = QtWidgets.QAction(MainWindow)
self.Action4.setObjectName("Action4")
self.Action5 = QtWidgets.QAction(MainWindow)
self.Action5.setObjectName("Action5")
self.Action6 = QtWidgets.QAction(MainWindow)
self.Action6.setObjectName("Action6")
self.Action7 = QtWidgets.QAction(MainWindow)
self.Action7.setObjectName("Action7")
self.Action8 = QtWidgets.QAction(MainWindow)
self.Action8.setObjectName("Action8")
self.Action9 = QtWidgets.QAction(MainWindow)
self.Action9.setObjectName("Action9")
self.toolBar1.addAction(self.Action1)
self.toolBar1.addSeparator()
self.toolBar1.addAction(self.Action2)
self.toolBar1.addSeparator()
self.toolBar1.addAction(self.Action3)
self.toolBar.addAction(self.Action4)
self.toolBar.addSeparator()
self.toolBar.addAction(self.Action5)
self.toolBar.addSeparator()
self.toolBar.addAction(self.Action6)
self.toolBar_2.addAction(self.Action7)
self.toolBar_2.addSeparator()
self.toolBar_2.addAction(self.Action8)
self.toolBar_2.addSeparator()
self.toolBar_2.addAction(self.Action9)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "PushButton"))
self.pushButton_2.setText(_translate("MainWindow", "PushButton"))
self.toolBar1.setWindowTitle(_translate("MainWindow", "toolBar"))
self.toolBar.setWindowTitle(_translate("MainWindow", "toolBar"))
self.toolBar_2.setWindowTitle(_translate("MainWindow", "toolBar_2"))
self.Action1.setText(_translate("MainWindow", "Action1"))
self.Action2.setText(_translate("MainWindow", "Action2"))
self.Action3.setText(_translate("MainWindow", "Action3"))
self.Action4.setText(_translate("MainWindow", "Action4"))
self.Action5.setText(_translate("MainWindow", "Action5"))
self.Action6.setText(_translate("MainWindow", "Action6"))
self.Action7.setText(_translate("MainWindow", "Action7"))
self.Action8.setText(_translate("MainWindow", "Action8"))
self.Action9.setText(_translate("MainWindow", "Action9"))
UI is created by PyQt5 designer.

One way to do this would be to connect to the actionTriggered signal of each toolbar, which sends the action that was clicked. Assuming you only want one action bold at a time, you can then use this to turn on bold for the current action and turn off bold for the previous action (if there is one):
class window(QMainWindow):
def __init__(self, parent=None):
...
for toolbar in self.findChildren(QtWidgets.QToolBar):
toolbar.actionTriggered.connect(self.setBoldAction)
def setBoldAction(self, target, toolbar=None):
if toolbar is None:
toolbar = self.sender()
for action in toolbar.actions():
if not action.isSeparator():
font = action.font()
font.setBold(action is target)
action.setFont(font)
If you want to set the bold action programmatically, you can also do:
self.setBoldAction(action, toolbar)

Getting a blank form when running PyQt application

I wrote a small PyQt program based on an example from a book. I edited the code to add some niceties. Below is my code:
from __future__ import division
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys
class Ui_MainWindow(QWidget):
def __init__(self):
QWidget.__init__(self)
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.verticalLayoutWidget = QtWidgets.QWidget(self.centralwidget)
self.verticalLayoutWidget.setGeometry(QtCore.QRect(9, 9, 781, 461))
self.verticalLayoutWidget.setObjectName("verticalLayoutWidget")
self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalLayoutWidget)
self.verticalLayout.setObjectName("verticalLayout")
self.textBrowser = QtWidgets.QTextBrowser(self.verticalLayoutWidget)
self.textBrowser.setObjectName("textBrowser")
self.verticalLayout.addWidget(self.textBrowser)
self.horizontalLayoutWidget = QtWidgets.QWidget(self.centralwidget)
self.horizontalLayoutWidget.setGeometry(QtCore.QRect(10, 480, 781, 80))
self.horizontalLayoutWidget.setObjectName("horizontalLayoutWidget")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.horizontalLayoutWidget)
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.label = QtWidgets.QLabel(self.horizontalLayoutWidget)
font = QtGui.QFont()
font.setPointSize(16)
self.label.setFont(font)
self.label.setObjectName("label")
self.horizontalLayout_2.addWidget(self.label)
self.lineEdit = QtWidgets.QLineEdit(self.horizontalLayoutWidget)
self.lineEdit.setBaseSize(QtCore.QSize(0, 0))
font = QtGui.QFont()
font.setPointSize(12)
self.lineEdit.setFont(font)
self.lineEdit.setText("")
self.lineEdit.setObjectName("lineEdit")
self.horizontalLayout_2.addWidget(self.lineEdit)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
self.menubar.setObjectName("menubar")
self.menuFile = QtWidgets.QMenu(self.menubar)
self.menuFile.setObjectName("menuFile")
MainWindow.setMenuBar(self.menubar)
self.actionQuit = QtWidgets.QAction(MainWindow)
self.actionQuit.setObjectName("actionQuit")
self.menuFile.addAction(self.actionQuit)
self.menubar.addAction(self.menuFile.menuAction())
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", "Expression:"))
self.menuFile.setTitle(_translate("MainWindow", "File"))
self.actionQuit.setText(_translate("MainWindow", "Quit (Ctrl+Q)"))
self.actionQuit.setShortcut(_translate("MainWindow", "Ctrl+Q"))
self.lineEdit.setFocus()
self.connect(self.lineEdit, self.updateUi)
self.setWindowTitle("Calculate")
def updateUi(self):
try:
text = unicode(self.lineEdit.text())
self.browser.append("%s = <b>%s</b>" % (text,eval(text)))
except:
self.browser.append("<font color=red>Invalid Expression</font>")
if __name__ == '__main__':
app = QApplication(sys.argv)
window = Ui_MainWindow()
window.show()
sys.exit(app.exec_())
Output:
But when I execute this file I only get a blank window without any widgets inside it. What is the error in my code?

You defined setupUi() function but I don't see you executing it anywhere. You should expand your __init__ with:
class Ui_MainWindow(QWidget):
def __init__(self):
QWidget.__init__(self)
self.setupUi(your_main_window)

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