How is it right to change the window when you press the button?

[Kadyn]

How do you do that when you hit the keyboard, "stop" in OCNE1, I went to OCNO2.

And when I pressed on the keyboard, turn around in OCNE2, I went to OCNO1 And when I pressed on the keyboard, "Stop" in OCNE2, I went to OCNO3.

And when I pressed on the keyboard, turn around in OCNE3, I went to OCNO2

ОКНО1

from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Window1(object):

def setupUi(self, Window1):

Window1.setObjectName('Window1')

Window1.resize(450, 800)

Window1.setWindowTitle(' ')

icon = QtGui.QIcon()

icon.addPixmap(QtGui.QPixmap('icon.png'), QtGui.QIcon.Normal, QtGui.QIcon.Off)

Window1.setWindowIcon(icon)

Window1.setStyleSheet('background-color: #2c2c39')

self.Main1 = QtWidgets.QWidget(Window1)

self.Main1.setObjectName('Main1')
    self.text_1 = QtWidgets.QLabel(self.Main1)
    self.text_1.setGeometry(QtCore.QRect(0, 0, 450, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    font.setBold(True)
    font.setWeight(75)
    self.text_1.setFont(font)
    self.text_1.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.text_1.setScaledContents(False)

self.text_1.setAlignment(QtCore.Qt.AlignCenter)

self.text_1.setWordWrap(False)

self.text_1.setOpenExternalLinks(False)

self.text_1.setObjectName('text_1')
    self.input_amount_1 = QtWidgets.QLineEdit(self.Main1)
    self.input_amount_1.setGeometry(QtCore.QRect(0, 58, 450, 40))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    font.setBold(True)
    font.setWeight(75)
    self.input_amount_1.setFont(font)
    self.input_amount_1.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.input_amount_1.setAlignment(QtCore.Qt.AlignCenter)

self.input_amount_1.setObjectName('input_amount_1')
    self.but_1 = QtWidgets.QPushButton(self.Main1)
    self.but_1.setGeometry(QtCore.QRect(0, 740, 450, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(14)
    self.but_1.setFont(font)
    self.but_1.setStyleSheet('QPushButton {\n'

'    color: #ffffff;\n'

'    background-color: #7f6a62;\n'

'    border-radius: 0;\n'

'}\n'

'\n'

'')

self.but_1.setObjectName('but_1')
    Window1.setCentralWidget(self.Main1)


    self.retranslateUi(Window1)
    QtCore.QMetaObject.connectSlotsByName(Window1)
    
    #ПРОДОЛЖИТЬ
    self.but_1.clicked.connect(self.proceed_1)

def retranslateUi(self, Window1):
    _translate = QtCore.QCoreApplication.translate
    self.but_1.setText(_translate('Window1', 'ПРОДОЛЖИТЬ'))
    self.text_1.setText(_translate('Window1', 'ОКНО 1'))

#ПРОДОЛЖИТЬ
def proceed_1(self):
    pass

if name == 'main':

import sys

app = QtWidgets.QApplication(sys.argv)

Window1 = QtWidgets.QMainWindow()

ui = Ui_Window1()

ui.setupUi(Window1)

Window1.show()

#QtCore.QTimer.singleShot(0, Window1.close)

sys.exit(app.exec_())

ОКНО2

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Window2(object):

def setupUi(self, Window2):

Window2.setObjectName('Window2')

Window2.resize(450, 800)

Window2.setWindowTitle(' ')

icon = QtGui.QIcon()

icon.addPixmap(QtGui.QPixmap('icon.png'), QtGui.QIcon.Normal, QtGui.QIcon.Off)

Window2.setWindowIcon(icon)

Window2.setStyleSheet('background-color: #2c2c39')

self.Main2 = QtWidgets.QWidget(Window2)

self.Main2.setObjectName('Main2')
    self.text_2 = QtWidgets.QLabel(self.Main2)
    self.text_2.setGeometry(QtCore.QRect(0, 0, 450, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    font.setBold(True)
    font.setWeight(75)
    self.text_2.setFont(font)
    self.text_2.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.text_2.setScaledContents(False)

self.text_2.setAlignment(QtCore.Qt.AlignCenter)

self.text_2.setWordWrap(False)

self.text_2.setOpenExternalLinks(False)

self.text_2.setObjectName('text_2')
    self.input_amount_2 = QtWidgets.QLineEdit(self.Main2)
    self.input_amount_2.setGeometry(QtCore.QRect(0, 58, 450, 40))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    font.setBold(True)
    font.setWeight(75)
    self.input_amount_2.setFont(font)
    self.input_amount_2.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.input_amount_2.setAlignment(QtCore.Qt.AlignCenter)

self.input_amount_2.setObjectName('input_amount_2')
    self.but_2 = QtWidgets.QPushButton(self.Main2)
    self.but_2.setGeometry(QtCore.QRect(0, 740, 225, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    self.but_2.setFont(font)
    self.but_2.setStyleSheet('QPushButton {\n'

'    color: #ffffff;\n'

'    background-color: #7f6a62;\n'

'    border-radius: 0;\n'

'}\n'

'\n'

'')

self.but_2.setObjectName('but_2')
    self.but_3 = QtWidgets.QPushButton(self.Main2)
    self.but_3.setGeometry(QtCore.QRect(225, 740, 225, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(14)
    self.but_3.setFont(font)
    self.but_3.setStyleSheet('QPushButton {\n'

'    color: #ffffff;\n'

'    background-color: #7f6a62;\n'

'    border-radius: 0;\n'

'}\n'

'\n'

'')

self.but_3.setObjectName('but_3')
    Window2.setCentralWidget(self.Main2)

    self.retranslateUi(Window2)
    QtCore.QMetaObject.connectSlotsByName(Window2)

    #ВЕРНУТЬСЯ
    self.but_2.clicked.connect(self.return_1)

    #ПРОДОЛЖИТЬ
    self.but_3.clicked.connect(self.proceed_2)

def retranslateUi(self, Window2):
    _translate = QtCore.QCoreApplication.translate
    self.but_2.setText(_translate('Window2', 'ВЕРНУТЬСЯ'))
    self.text_2.setText(_translate('Window2', 'ОКНО 2'))
    self.but_3.setText(_translate('Window2', 'ПРОДОЛЖИТЬ'))

#ВЕРНУТЬСЯ
def return_1(self):
    pass

#ПРОДОЛЖИТЬ
def proceed_2(self):
    pass

if name == 'main':

import sys

app = QtWidgets.QApplication(sys.argv)

Window2 = QtWidgets.QMainWindow()

ui = Ui_Window2()

ui.setupUi(Window2)

Window2.show()

sys.exit(app.exec_())

ОКНО3

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Window3(object):

def setupUi(self, Window3):

Window3.setObjectName('Window3')

Window3.resize(450, 800)

Window3.setWindowTitle(' ')

icon = QtGui.QIcon()

icon.addPixmap(QtGui.QPixmap('icon.png'), QtGui.QIcon.Normal, QtGui.QIcon.Off)

Window3.setWindowIcon(icon)

Window3.setStyleSheet('background-color: #2c2c39')

self.Main3 = QtWidgets.QWidget(Window3)

self.Main3.setObjectName('Main3')
    self.text_3 = QtWidgets.QLabel(self.Main3)
    self.text_3.setGeometry(QtCore.QRect(0, 0, 450, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    font.setBold(True)
    font.setWeight(75)
    self.text_3.setFont(font)
    self.text_3.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.text_3.setScaledContents(False)

self.text_3.setAlignment(QtCore.Qt.AlignCenter)

self.text_3.setWordWrap(False)

self.text_3.setOpenExternalLinks(False)

self.text_3.setObjectName('text_3')
    self.input_amount_3 = QtWidgets.QLineEdit(self.Main3)
    self.input_amount_3.setGeometry(QtCore.QRect(0, 58, 450, 40))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(14)
    font.setBold(True)
    font.setWeight(75)
    self.input_amount_3.setFont(font)
    self.input_amount_3.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.input_amount_3.setAlignment(QtCore.Qt.AlignCenter)

self.input_amount_3.setObjectName('input_amount_3')
    self.but_4 = QtWidgets.QPushButton(self.Main3)
    self.but_4.setGeometry(QtCore.QRect(0, 740, 450, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(14)
    self.but_4.setFont(font)
    self.but_4.setStyleSheet('QPushButton {\n'

'    color: #ffffff;\n'

'    background-color: #7f6a62;\n'

'    border-radius: 0;\n'

'}\n'

'\n'

'')

self.but_4.setObjectName('but_4')
    Window3.setCentralWidget(self.Main3)

    self.retranslateUi(Window3)
    QtCore.QMetaObject.connectSlotsByName(Window3)

    #ВЕРНУТЬСЯ
    self.but_4.clicked.connect(self.return_2)

def retranslateUi(self, Window3):
    _translate = QtCore.QCoreApplication.translate
    self.but_4.setText(_translate('Window3', 'ВЕРНУТЬСЯ'))
    self.text_3.setText(_translate('Window3', 'ОКНО 3'))

#ВЕРНУТЬСЯ
def return_2(self):
    pass

if name == 'main':

import sys

app = QtWidgets.QApplication(sys.argv)

Window3 = QtWidgets.QMainWindow()

ui = Ui_Window3()

ui.setupUi(Window3)

Window3.show()

sys.exit(app.exec_())

[shizuka]

No change in the code generated by Qt Designer,♪

Create another class that inherits from the relevant view and use the established class to fill it.

from PyQt5 import QtCore, QtGui, QtWidgets
ОКНО1
class Ui_Window1(object):

def setupUi(self, Window1):

Window1.setObjectName('Window1')

Window1.resize(450, 800)

Window1.setWindowTitle(' ')

icon = QtGui.QIcon()

icon.addPixmap(QtGui.QPixmap('icon.png'), QtGui.QIcon.Normal, QtGui.QIcon.Off)

Window1.setWindowIcon(icon)

Window1.setStyleSheet('background-color: #2c2c39')

self.Main1 = QtWidgets.QWidget(Window1)

self.Main1.setObjectName('Main1')
    self.text_1 = QtWidgets.QLabel(self.Main1)
    self.text_1.setGeometry(QtCore.QRect(0, 0, 450, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    font.setBold(True)
    font.setWeight(75)
    self.text_1.setFont(font)
    self.text_1.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.text_1.setScaledContents(False)

self.text_1.setAlignment(QtCore.Qt.AlignCenter)

self.text_1.setWordWrap(False)

self.text_1.setOpenExternalLinks(False)

self.text_1.setObjectName('text_1')
    self.input_amount_1 = QtWidgets.QLineEdit(self.Main1)
    self.input_amount_1.setGeometry(QtCore.QRect(0, 58, 450, 40))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    font.setBold(True)
    font.setWeight(75)
    self.input_amount_1.setFont(font)
    self.input_amount_1.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.input_amount_1.setAlignment(QtCore.Qt.AlignCenter)

self.input_amount_1.setObjectName('input_amount_1')
    self.but_1 = QtWidgets.QPushButton(self.Main1)

740
    self.but_1.setGeometry(QtCore.QRect(0, 580, 450, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(14)
    self.but_1.setFont(font)
    self.but_1.setStyleSheet('QPushButton {\n'

'    color: #ffffff;\n'

'    background-color: #7f6a62;\n'

'    border-radius: 0;\n'

'}\n'

'\n'

'')

self.but_1.setObjectName('but_1')
    Window1.setCentralWidget(self.Main1)


    self.retranslateUi(Window1)
    QtCore.QMetaObject.connectSlotsByName(Window1)
    
def retranslateUi(self, Window1):
    _translate = QtCore.QCoreApplication.translate
    self.but_1.setText(_translate('Window1', 'ПРОДОЛЖИТЬ'))
    self.text_1.setText(_translate('Window1', 'ОКНО 1'))

class Ui_Window2(object):

def setupUi(self, Window2):

Window2.setObjectName('Window2')

Window2.resize(450, 800)

Window2.setWindowTitle(' ')

icon = QtGui.QIcon()

icon.addPixmap(QtGui.QPixmap('icon.png'), QtGui.QIcon.Normal, QtGui.QIcon.Off)

Window2.setWindowIcon(icon)

Window2.setStyleSheet('background-color: #2c2c39')

self.Main2 = QtWidgets.QWidget(Window2)

self.Main2.setObjectName('Main2')
    self.text_2 = QtWidgets.QLabel(self.Main2)
    self.text_2.setGeometry(QtCore.QRect(0, 0, 450, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    font.setBold(True)
    font.setWeight(75)
    self.text_2.setFont(font)
    self.text_2.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.text_2.setScaledContents(False)

self.text_2.setAlignment(QtCore.Qt.AlignCenter)

self.text_2.setWordWrap(False)

self.text_2.setOpenExternalLinks(False)

self.text_2.setObjectName('text_2')
    self.input_amount_2 = QtWidgets.QLineEdit(self.Main2)
    self.input_amount_2.setGeometry(QtCore.QRect(0, 58, 450, 40))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    font.setBold(True)
    font.setWeight(75)
    self.input_amount_2.setFont(font)
    self.input_amount_2.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.input_amount_2.setAlignment(QtCore.Qt.AlignCenter)

self.input_amount_2.setObjectName('input_amount_2')
    self.but_2 = QtWidgets.QPushButton(self.Main2)
    self.but_2.setGeometry(QtCore.QRect(0, 580, 225, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    self.but_2.setFont(font)
    self.but_2.setStyleSheet('QPushButton {\n'

'    color: #ffffff;\n'

'    background-color: #7f6a62;\n'

'    border-radius: 0;\n'

'}\n'

'\n'

'')

self.but_2.setObjectName('but_2')
    self.but_3 = QtWidgets.QPushButton(self.Main2)
    self.but_3.setGeometry(QtCore.QRect(225, 580, 225, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(14)
    self.but_3.setFont(font)
    self.but_3.setStyleSheet('QPushButton {\n'

'    color: #ffffff;\n'

'    background-color: #7f6a62;\n'

'    border-radius: 0;\n'

'}\n'

'\n'

'')

self.but_3.setObjectName('but_3')
    Window2.setCentralWidget(self.Main2)

    self.retranslateUi(Window2)
    QtCore.QMetaObject.connectSlotsByName(Window2)

def retranslateUi(self, Window2):
    _translate = QtCore.QCoreApplication.translate
    self.but_2.setText(_translate('Window2', 'ВЕРНУТЬСЯ'))
    self.text_2.setText(_translate('Window2', 'ОКНО 2'))
    self.but_3.setText(_translate('Window2', 'ПРОДОЛЖИТЬ'))

class Ui_Window3(object):

def setupUi(self, Window3):

Window3.setObjectName('Window3')

Window3.resize(450, 800)

Window3.setWindowTitle(' ')

icon = QtGui.QIcon()

icon.addPixmap(QtGui.QPixmap('icon.png'), QtGui.QIcon.Normal, QtGui.QIcon.Off)

Window3.setWindowIcon(icon)

Window3.setStyleSheet('background-color: #2c2c39')

self.Main3 = QtWidgets.QWidget(Window3)

self.Main3.setObjectName('Main3')
    self.text_3 = QtWidgets.QLabel(self.Main3)
    self.text_3.setGeometry(QtCore.QRect(0, 0, 450, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(12)
    font.setBold(True)
    font.setWeight(75)
    self.text_3.setFont(font)
    self.text_3.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.text_3.setScaledContents(False)

self.text_3.setAlignment(QtCore.Qt.AlignCenter)

self.text_3.setWordWrap(False)

self.text_3.setOpenExternalLinks(False)

self.text_3.setObjectName('text_3')
    self.input_amount_3 = QtWidgets.QLineEdit(self.Main3)
    self.input_amount_3.setGeometry(QtCore.QRect(0, 58, 450, 40))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(14)
    font.setBold(True)
    font.setWeight(75)
    self.input_amount_3.setFont(font)
    self.input_amount_3.setStyleSheet('background-color: #edf3c8;\n'

'border:2px solid#d9c7b4;\n'

'color:#000000')

self.input_amount_3.setAlignment(QtCore.Qt.AlignCenter)

self.input_amount_3.setObjectName('input_amount_3')
    self.but_4 = QtWidgets.QPushButton(self.Main3)
    self.but_4.setGeometry(QtCore.QRect(0, 580, 450, 60))
    font = QtGui.QFont()
    font.setFamily('Montserrat')
    font.setPointSize(14)
    self.but_4.setFont(font)
    self.but_4.setStyleSheet('QPushButton {\n'

'    color: #ffffff;\n'

'    background-color: #7f6a62;\n'

'    border-radius: 0;\n'

'}\n'

'\n'

'')

self.but_4.setObjectName('but_4')

Window3.setCentralWidget(self.Main3)
    self.retranslateUi(Window3)
    QtCore.QMetaObject.connectSlotsByName(Window3)

def retranslateUi(self, Window3):
    _translate = QtCore.QCoreApplication.translate
    self.but_4.setText(_translate('Window3', 'ВЕРНУТЬСЯ'))
    self.text_3.setText(_translate('Window3', 'ОКНО 3'))

class Window3(QtWidgets.QMainWindow, Ui_Window3):

def init(self, parent=None):

super().init()

self.setupUi(self)

self.parent = parent
    #ВЕРНУТЬСЯ
    self.but_4.clicked.connect(self.return_2)

#ВЕРНУТЬСЯ
def return_2(self):
    self.parent.window2.show()
    self.hide()

class Window2(QtWidgets.QMainWindow, Ui_Window2):

def init(self, parent=None):

super().init()

self.setupUi(self)

self.parent = parent
    #ВЕРНУТЬСЯ
    self.but_2.clicked.connect(self.return_1)

    #ПРОДОЛЖИТЬ
    self.but_3.clicked.connect(self.proceed_2)

#ВЕРНУТЬСЯ
def return_1(self):
    self.parent.show()
    self.hide()

#ПРОДОЛЖИТЬ
def proceed_2(self):
    self.parent.window3.show()
    self.hide()

class MainWindow(QtWidgets.QMainWindow, Ui_Window1):

def init(self):

super().init()

self.setupUi(self)
    #ПРОДОЛЖИТЬ
    self.but_1.clicked.connect(self.proceed_1)
    
    self.window2 = Window2(self)
    self.window3 = Window3(self)
    
#ПРОДОЛЖИТЬ
def proceed_1(self):
    print(f'def proceed_1(self):') # 

self.window2 = Window2(self)
    self.window2.show()
    self.hide()

if name == 'main':

import sys

app = QtWidgets.QApplication(sys.argv)

Window1 = MainWindow()

Window1.show()

sys.exit(app.exec_())