PyQt5 "TypeError: setCentralWidget(self, QWidget): argument 1 has unexpected type 'Shop'" hatası

Evet arkadaşlar kodlarım bunlar:

[CODE lang="python" highlight="173-190"]import sys
from PyQt5 import QtWidgets, QtGui

class Main(QtWidgets.QWidget):

def __init__(self):

super().__init__()

self.init_ui()

def init_ui(self):

self.label = QtWidgets.QLabel("Clicker Simulator")
self.buttonStart = QtWidgets.QPushButton("Start")
self.buttonShop = QtWidgets.QPushButton("Shop")
self.buttonQuit = QtWidgets.QPushButton("Quit")

v_box = QtWidgets.QVBoxLayout()

v_box.addStretch()
v_box.addWidget(self.label)
v_box.addWidget(self.buttonStart)
v_box.addWidget(self.buttonShop)
v_box.addWidget(self.buttonQuit)
v_box.addStretch()

h_box = QtWidgets.QHBoxLayout()

h_box.addStretch()
h_box.addLayout(v_box)
h_box.addStretch()

self.setLayout(h_box)

class Game(QtWidgets.QWidget):

def __init__(self):

super().__init__()

self.init_ui()

def init_ui(self):

self.say = 0
self.credit = 0
self.click1 = False
self.click2 = False
self.click3 = False

self.label = QtWidgets.QLabel("You haven't clicked the button yet!")
self.button = QtWidgets.QPushButton("Click Me ")
self.labelUnknown = QtWidgets.QLabel("???")

v_box = QtWidgets.QVBoxLayout()

v_box.addStretch()
v_box.addWidget(self.label)
v_box.addWidget(self.button)
v_box.addWidget(self.labelUnknown)
v_box.addStretch()

h_box = QtWidgets.QHBoxLayout()

h_box.addStretch()
h_box.addLayout(v_box)
h_box.addStretch()

self.setLayout(h_box)

from PyQt5 import QtCore, QtGui, QtWidgets

# I used a .ui to .py converter to write this code (Start)

class Shop(object):
def setupUi(self, Form):
Form.setObjectName("Form")
Form.resize(400, 300)
self.pushButton = QtWidgets.QPushButton(Form)
self.pushButton.setGeometry(QtCore.QRect(10, 10, 75, 23))
self.pushButton.setObjectName("pushButton")
self.horizontalLayoutWidget = QtWidgets.QWidget(Form)
self.horizontalLayoutWidget.setGeometry(QtCore.QRect(20, 190, 351, 80))
self.horizontalLayoutWidget.setObjectName("horizontalLayoutWidget")
self.horizontalLayout = QtWidgets.QHBoxLayout(self.horizontalLayoutWidget)
self.horizontalLayout.setContentsMargins(0, 0, 0, 0)
self.horizontalLayout.setObjectName("horizontalLayout")
self.pushButton_3 = QtWidgets.QPushButton(self.horizontalLayoutWidget)
self.pushButton_3.setObjectName("pushButton_3")
self.horizontalLayout.addWidget(self.pushButton_3)
self.pushButton_4 = QtWidgets.QPushButton(self.horizontalLayoutWidget)
self.pushButton_4.setObjectName("pushButton_4")
self.horizontalLayout.addWidget(self.pushButton_4)
self.pushButton_2 = QtWidgets.QPushButton(self.horizontalLayoutWidget)
self.pushButton_2.setObjectName("pushButton_2")
self.horizontalLayout.addWidget(self.pushButton_2)
self.label = QtWidgets.QLabel(Form)
self.label.setGeometry(QtCore.QRect(30, 110, 89, 78))
self.label.setObjectName("label")
self.label_2 = QtWidgets.QLabel(Form)
self.label_2.setGeometry(QtCore.QRect(140, 140, 101, 21))
self.label_2.setObjectName("label_2")
self.label_3 = QtWidgets.QLabel(Form)
self.label_3.setGeometry(QtCore.QRect(260, 140, 111, 20))
self.label_3.setObjectName("label_3")
self.label_4 = QtWidgets.QLabel(Form)
self.label_4.setGeometry(QtCore.QRect(320, 0, 81, 20))
self.label_4.setObjectName("label_4")
self.horizontalLayoutWidget_2 = QtWidgets.QWidget(Form)
self.horizontalLayoutWidget_2.setGeometry(QtCore.QRect(20, 60, 351, 80))
self.horizontalLayoutWidget_2.setObjectName("horizontalLayoutWidget_2")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.horizontalLayoutWidget_2)
self.horizontalLayout_2.setContentsMargins(0, 0, 0, 0)
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
self.horizontalLayout_3.setObjectName("horizontalLayout_3")
self.label_5 = QtWidgets.QLabel(self.horizontalLayoutWidget_2)
self.label_5.setObjectName("label_5")
self.horizontalLayout_3.addWidget(self.label_5)
self.label_6 = QtWidgets.QLabel(self.horizontalLayoutWidget_2)
self.label_6.setObjectName("label_6")
self.horizontalLayout_3.addWidget(self.label_6)
self.label_7 = QtWidgets.QLabel(self.horizontalLayoutWidget_2)
self.label_7.setObjectName("label_7")
self.horizontalLayout_3.addWidget(self.label_7)
self.horizontalLayout_2.addLayout(self.horizontalLayout_3)

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

def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
Form.setWindowTitle(_translate("Clicker", "Form"))
self.pushButton.setText(_translate("Form", "Back"))
self.pushButton_3.setText(_translate("Form", "Buy"))
self.pushButton_4.setText(_translate("Form", "Buy"))
self.pushButton_2.setText(_translate("Form", "Buy"))
self.label.setText(_translate("Form", "Extra 1 click"))
self.label_2.setText(_translate("Form", "Extra 100 clicks"))
self.label_3.setText(_translate("Form", "Extra 1000 clicks"))
self.label_4.setText(_translate("Form", "Credits: None"))
self.label_5.setText(_translate("Form", "100 credits"))
self.label_6.setText(_translate("Form", "1000 credits"))
self.label_7.setText(_translate("Form", "10.000 credits"))

# (End)

class MainWindow(QtWidgets.QMainWindow):

def __init__(self):

super().__init__()

self.mainMenu = Main()
self.game = Game()
self.shop = Shop()

self.setCentralWidget(self.mainMenu)

self.setWindowIcon(QtGui.QIcon("clicker icon.png"))
self.setWindowTitle("Clicker.py")
self.show()

self.mainMenu.buttonStart.clicked.connect(self.start)
self.mainMenu.buttonShop.clicked.connect(self.shopFunc)
self.mainMenu.buttonQuit.clicked.connect(self.quit)

def start(self):

self.setCentralWidget(self.game)
self.game.button.clicked.connect(self.clicked)

def shopFunc(self):

self.setCentralWidget(self.shop)

if self.game.credit < 1:

self.label_4.setText("Credits: None")

else:

self.label_4.setText("Credits")

self.shop.pushButton.clicked.connect(self.back)
self.shop.pushButton_3.clicked.connect(self.buy)
self.shop.pushButton_4.clicked.connect(self.buy2)
self.shop.pushButton_2.clicked.connect(self.buy3)

def back(self):

self.setCentralWidget(self.mainMenu)

def buy(self):

self.game.credit -= 100
self.game.click1 = True

def buy2(self):

self.game.credit -= 1000
self.game.click2 = True

def buy3(self):

self.game.credit -= 10000
self.game.click3 = True

def clicked(self):

if self.game.click1 == True:

self.game.say += 2
self.game.credit += 4

elif self.game.click2 == True:

self.game.say += 101
self.game.credit += 202

elif self.game.click3 == True:

self.game.say += 1001
self.game.credit += 2002

else:

self.game.say += 1
self.game.credit += 2

self.game.label.setText("You've clicked the button {} times!".format(self.game.say))

if self.game.say == 100000:

self.game.label.setText("Congratulations! You've clicked the button 100.000 times!")

def quit(self):

self.close()

app = QtWidgets.QApplication(sys.argv)

mainW = MainWindow()

sys.exit(app.exec_())[/CODE]