[FIXED] Responsiveness, made in QT Designer, is not working. Python

Issue

I made an application design in QT Designer and saved it as a .ui file.
Next, converted .ui file into .py file with this command - pyuic5 -o design.py responsive_design.ui
After this, added this 👇

app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())

at the end of a file to make it work.
But, unfortunately, when my Python file starts, application opens with a static design, not responsive, as expected.
I see this -

Is it a QT bug or my mistake? Is it possible to resolve this problem?

My full code is below -

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'responsive_design.ui'
#
# Created by: PyQt5 UI code generator 5.15.0
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QApplication, QDialog, QMainWindow, QMessageBox



class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 450)
        MainWindow.setMinimumSize(QtCore.QSize(800, 450))
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(0, 0, 801, 451))
        self.label.setText("")
        self.label.setPixmap(QtGui.QPixmap("../Downloads/bg.png"))
        self.label.setScaledContents(True)
        self.label.setAlignment(QtCore.Qt.AlignCenter)
        self.label.setObjectName("label")
        self.verticalLayoutWidget = QtWidgets.QWidget(self.centralwidget)
        self.verticalLayoutWidget.setGeometry(QtCore.QRect(-1, 0, 801, 451))
        self.verticalLayoutWidget.setObjectName("verticalLayoutWidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalLayoutWidget)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setObjectName("verticalLayout")
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.label_2 = QtWidgets.QLabel(self.verticalLayoutWidget)
        self.label_2.setText("")
        self.label_2.setPixmap(QtGui.QPixmap(""))
        self.label_2.setScaledContents(False)
        self.label_2.setAlignment(QtCore.Qt.AlignCenter)
        self.label_2.setObjectName("label_2")
        self.horizontalLayout.addWidget(self.label_2)
        spacerItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout.addItem(spacerItem)
        self.label_3 = QtWidgets.QLabel(self.verticalLayoutWidget)
        self.label_3.setText("")
        self.label_3.setPixmap(QtGui.QPixmap(""))
        self.label_3.setScaledContents(False)
        self.label_3.setAlignment(QtCore.Qt.AlignCenter)
        self.label_3.setObjectName("label_3")
        self.horizontalLayout.addWidget(self.label_3)
        self.horizontalLayout.setStretch(0, 1)
        self.horizontalLayout.setStretch(1, 4)
        self.horizontalLayout.setStretch(2, 1)
        self.verticalLayout.addLayout(self.horizontalLayout)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.label_5 = QtWidgets.QLabel(self.verticalLayoutWidget)
        self.label_5.setText("")
        self.label_5.setObjectName("label_5")
        self.horizontalLayout_2.addWidget(self.label_5)
        self.label_6 = QtWidgets.QLabel(self.verticalLayoutWidget)
        font = QtGui.QFont()
        font.setFamily("Comic Sans MS")
        font.setPointSize(16)
        self.label_6.setFont(font)
        self.label_6.setStyleSheet("background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(255, 255, 255, 236), stop:1 rgba(255, 255, 255, 220));\n"
"border-radius: 10px;")
        self.label_6.setAlignment(QtCore.Qt.AlignCenter)
        self.label_6.setObjectName("label_6")
        self.horizontalLayout_2.addWidget(self.label_6)
        self.label_4 = QtWidgets.QLabel(self.verticalLayoutWidget)
        self.label_4.setText("")
        self.label_4.setObjectName("label_4")
        self.horizontalLayout_2.addWidget(self.label_4)
        self.horizontalLayout_2.setStretch(0, 1)
        self.horizontalLayout_2.setStretch(1, 5)
        self.horizontalLayout_2.setStretch(2, 1)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.label_7 = QtWidgets.QLabel(self.verticalLayoutWidget)
        self.label_7.setText("")
        self.label_7.setObjectName("label_7")
        self.horizontalLayout_3.addWidget(self.label_7)
        self.gridLayout = QtWidgets.QGridLayout()
        self.gridLayout.setObjectName("gridLayout")
        self.label_11 = QtWidgets.QLabel(self.verticalLayoutWidget)
        font = QtGui.QFont()
        font.setFamily("Comic Sans MS")
        font.setPointSize(7)
        self.label_11.setFont(font)
        self.label_11.setAlignment(QtCore.Qt.AlignCenter)
        self.label_11.setObjectName("label_11")
        self.gridLayout.addWidget(self.label_11, 2, 0, 1, 1)
        self.label_10 = QtWidgets.QLabel(self.verticalLayoutWidget)
        self.label_10.setToolTip("")
        self.label_10.setWhatsThis("")
        self.label_10.setText("")
        self.label_10.setPixmap(QtGui.QPixmap("../microphone.png"))
        self.label_10.setAlignment(QtCore.Qt.AlignCenter)
        self.label_10.setObjectName("label_10")
        self.gridLayout.addWidget(self.label_10, 1, 0, 1, 1)
        self.label_9 = QtWidgets.QLabel(self.verticalLayoutWidget)
        self.label_9.setText("")
        self.label_9.setAlignment(QtCore.Qt.AlignCenter)
        self.label_9.setObjectName("label_9")
        self.gridLayout.addWidget(self.label_9, 0, 0, 1, 1)
        self.horizontalLayout_3.addLayout(self.gridLayout)
        self.label_8 = QtWidgets.QLabel(self.verticalLayoutWidget)
        self.label_8.setText("")
        self.label_8.setObjectName("label_8")
        self.horizontalLayout_3.addWidget(self.label_8)
        self.horizontalLayout_3.setStretch(0, 5)
        self.horizontalLayout_3.setStretch(1, 4)
        self.horizontalLayout_3.setStretch(2, 5)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.label_14 = QtWidgets.QLabel(self.verticalLayoutWidget)
        self.label_14.setText("")
        self.label_14.setObjectName("label_14")
        self.horizontalLayout_4.addWidget(self.label_14)
        self.gridLayout_2 = QtWidgets.QGridLayout()
        self.gridLayout_2.setObjectName("gridLayout_2")
        self.label_16 = QtWidgets.QLabel(self.verticalLayoutWidget)
        self.label_16.setText("")
        self.label_16.setObjectName("label_16")
        self.gridLayout_2.addWidget(self.label_16, 2, 0, 1, 1)
        self.label_15 = QtWidgets.QLabel(self.verticalLayoutWidget)
        font = QtGui.QFont()
        font.setFamily("Comic Sans MS")
        font.setPointSize(12)
        self.label_15.setFont(font)
        self.label_15.setStyleSheet("background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(255, 255, 255, 236), stop:1 rgba(255, 255, 255, 220));\n"
"border-radius: 10px;")
        self.label_15.setAlignment(QtCore.Qt.AlignCenter)
        self.label_15.setObjectName("label_15")
        self.gridLayout_2.addWidget(self.label_15, 1, 0, 1, 1)
        self.label_13 = QtWidgets.QLabel(self.verticalLayoutWidget)
        font = QtGui.QFont()
        font.setFamily("Comic Sans MS")
        font.setPointSize(7)
        self.label_13.setFont(font)
        self.label_13.setAlignment(QtCore.Qt.AlignCenter)
        self.label_13.setObjectName("label_13")
        self.gridLayout_2.addWidget(self.label_13, 0, 0, 1, 1)
        self.gridLayout_2.setRowStretch(0, 1)
        self.gridLayout_2.setRowStretch(1, 3)
        self.horizontalLayout_4.addLayout(self.gridLayout_2)
        self.label_12 = QtWidgets.QLabel(self.verticalLayoutWidget)
        self.label_12.setText("")
        self.label_12.setObjectName("label_12")
        self.horizontalLayout_4.addWidget(self.label_12)
        self.horizontalLayout_4.setStretch(0, 4)
        self.horizontalLayout_4.setStretch(1, 5)
        self.horizontalLayout_4.setStretch(2, 4)
        self.verticalLayout.addLayout(self.horizontalLayout_4)
        self.verticalLayout.setStretch(0, 2)
        self.verticalLayout.setStretch(1, 8)
        self.verticalLayout.setStretch(2, 2)
        self.verticalLayout.setStretch(3, 6)
        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.label_6.setText(_translate("MainWindow", "Output"))
        self.label_11.setText(_translate("MainWindow", "I'm listening when microphone is visible"))
        self.label_15.setText(_translate("MainWindow", "SAID"))
        self.label_13.setText(_translate("MainWindow", "I Think You Said:"))

app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())

Solution

first I installed the centrallayout, then I loaded all the elements to the layouts and I loaded these layouts to the centrallayout.

check the differences and edit it yourself

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'responsive_design.ui'
#
# Created by: PyQt5 UI code generator 5.15.0
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QApplication, QDialog, QMainWindow, QMessageBox, QVBoxLayout, QScrollArea, QWidget



class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 450)
        MainWindow.setMinimumSize(QtCore.QSize(800, 450))
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel()        
        self.label.setPixmap(QtGui.QPixmap("../Downloads/bg.png"))
        self.label.setScaledContents(True)
        self.label.setAlignment(QtCore.Qt.AlignCenter)
        self.label.setObjectName("label")
        self.centralLayout = QVBoxLayout(self.centralwidget)
        self.centralLayout.setContentsMargins(0,0,0,0)
        self.centralLayout.addWidget(self.label)
        self.verticalLayout = QtWidgets.QVBoxLayout(self.label)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setObjectName("verticalLayout")
        
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.label_2 = QtWidgets.QLabel()
        self.label_2.setText("")
        self.label_2.setPixmap(QtGui.QPixmap(""))
        self.label_2.setScaledContents(False)
        self.label_2.setAlignment(QtCore.Qt.AlignCenter)
        self.label_2.setObjectName("label_2")
        self.horizontalLayout.addWidget(self.label_2)
        spacerItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout.addItem(spacerItem)
        self.label_3 = QtWidgets.QLabel()
        self.label_3.setText("")
        self.label_3.setPixmap(QtGui.QPixmap(""))
        self.label_3.setScaledContents(False)
        self.label_3.setAlignment(QtCore.Qt.AlignCenter)
        self.label_3.setObjectName("label_3")
        self.horizontalLayout.addWidget(self.label_3)
        self.horizontalLayout.setStretch(0, 1)
        self.horizontalLayout.setStretch(1, 4)
        self.horizontalLayout.setStretch(2, 1)
        self.verticalLayout.addLayout(self.horizontalLayout)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.label_5 = QtWidgets.QLabel()
        self.label_5.setText("")
        self.label_5.setObjectName("label_5")
        self.horizontalLayout_2.addWidget(self.label_5)
        self.label_6 = QtWidgets.QLabel()
        font = QtGui.QFont()
        font.setFamily("Comic Sans MS")
        font.setPointSize(16)
        self.label_6.setFont(font)
        self.label_6.setStyleSheet("background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(255, 255, 255, 236), stop:1 rgba(255, 255, 255, 220));\n"
"border-radius: 10px;")
        self.label_6.setAlignment(QtCore.Qt.AlignCenter)
        self.label_6.setObjectName("label_6")
        self.horizontalLayout_2.addWidget(self.label_6)
        self.label_4 = QtWidgets.QLabel()
        self.label_4.setText("")
        self.label_4.setObjectName("label_4")
        self.horizontalLayout_2.addWidget(self.label_4)
        self.horizontalLayout_2.setStretch(0, 1)
        self.horizontalLayout_2.setStretch(1, 5)
        self.horizontalLayout_2.setStretch(2, 1)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.label_7 = QtWidgets.QLabel()
        self.label_7.setText("")
        self.label_7.setObjectName("label_7")
        self.horizontalLayout_3.addWidget(self.label_7)
        self.gridLayout = QtWidgets.QGridLayout()
        self.gridLayout.setObjectName("gridLayout")
        self.label_11 = QtWidgets.QLabel()
        font = QtGui.QFont()
        font.setFamily("Comic Sans MS")
        font.setPointSize(7)
        self.label_11.setFont(font)
        self.label_11.setAlignment(QtCore.Qt.AlignCenter)
        self.label_11.setObjectName("label_11")
        self.gridLayout.addWidget(self.label_11, 2, 0, 1, 1)
        self.label_10 = QtWidgets.QLabel()
        self.label_10.setToolTip("")
        self.label_10.setWhatsThis("")
        self.label_10.setText("")
        self.label_10.setPixmap(QtGui.QPixmap("../microphone.png"))
        self.label_10.setAlignment(QtCore.Qt.AlignCenter)
        self.label_10.setObjectName("label_10")
        self.gridLayout.addWidget(self.label_10, 1, 0, 1, 1)
        self.label_9 = QtWidgets.QLabel()
        self.label_9.setText("")
        self.label_9.setAlignment(QtCore.Qt.AlignCenter)
        self.label_9.setObjectName("label_9")
        self.gridLayout.addWidget(self.label_9, 0, 0, 1, 1)
        self.horizontalLayout_3.addLayout(self.gridLayout)
        self.label_8 = QtWidgets.QLabel()
        self.label_8.setText("")
        self.label_8.setObjectName("label_8")
        self.horizontalLayout_3.addWidget(self.label_8)
        self.horizontalLayout_3.setStretch(0, 5)
        self.horizontalLayout_3.setStretch(1, 4)
        self.horizontalLayout_3.setStretch(2, 5)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.label_14 = QtWidgets.QLabel()
        self.label_14.setText("")
        self.label_14.setObjectName("label_14")
        self.horizontalLayout_4.addWidget(self.label_14)
        self.gridLayout_2 = QtWidgets.QGridLayout()
        self.gridLayout_2.setObjectName("gridLayout_2")
        self.label_16 = QtWidgets.QLabel()
        self.label_16.setText("")
        self.label_16.setObjectName("label_16")
        self.gridLayout_2.addWidget(self.label_16, 2, 0, 1, 1)
        self.label_15 = QtWidgets.QLabel()
        font = QtGui.QFont()
        font.setFamily("Comic Sans MS")
        font.setPointSize(12)
        self.label_15.setFont(font)
        self.label_15.setStyleSheet("background-color: qlineargradient(spread:pad, x1:0, y1:0, x2:1, y2:0, stop:0 rgba(255, 255, 255, 236), stop:1 rgba(255, 255, 255, 220));\n"
"border-radius: 10px;")
        self.label_15.setAlignment(QtCore.Qt.AlignCenter)
        self.label_15.setObjectName("label_15")
        self.gridLayout_2.addWidget(self.label_15, 1, 0, 1, 1)
        self.label_13 = QtWidgets.QLabel()
        font = QtGui.QFont()
        font.setFamily("Comic Sans MS")
        font.setPointSize(7)
        self.label_13.setFont(font)
        self.label_13.setAlignment(QtCore.Qt.AlignCenter)
        self.label_13.setObjectName("label_13")
        self.gridLayout_2.addWidget(self.label_13, 0, 0, 1, 1)
        self.gridLayout_2.setRowStretch(0, 1)
        self.gridLayout_2.setRowStretch(1, 3)
        self.horizontalLayout_4.addLayout(self.gridLayout_2)
        self.label_12 = QtWidgets.QLabel()
        self.label_12.setText("")
        self.label_12.setObjectName("label_12")
        self.horizontalLayout_4.addWidget(self.label_12)
        self.horizontalLayout_4.setStretch(0, 4)
        self.horizontalLayout_4.setStretch(1, 5)
        self.horizontalLayout_4.setStretch(2, 4)
        self.verticalLayout.addLayout(self.horizontalLayout_4)
        self.verticalLayout.setStretch(0, 2)
        self.verticalLayout.setStretch(1, 8)
        self.verticalLayout.setStretch(2, 2)
        self.verticalLayout.setStretch(3, 6)
        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.label_6.setText(_translate("MainWindow", "Output"))
        self.label_11.setText(_translate("MainWindow", "I'm listening when microphone is visible"))
        self.label_15.setText(_translate("MainWindow", "SAID"))
        self.label_13.setText(_translate("MainWindow", "I Think You Said:"))

app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())

Answered By - SimoN SavioR