AttributeError: 'QWidget' object has no attribute 'tk'. Did you mean: 'tr'? PyQt5 Python - python-3.x

Question

I am trying to make canvas for PyQt5 GUI. For this, I've used TkInter's canvas property. So I created a new widget in Qt Designer for tkinter's canvas.
As you can see from the picture below, I created promoted class for QWidget to use Canvas.
Then I converted this GUI into python code.
When I try to run my GUI, I'm getting the error which is on the title.
That's normal code:
from sympy import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from tkinter.messagebox import *
import sympy
import sys
from tkinter import Canvas
from untitled import *
class canvastrying(QMainWindow):
def __init__(self) -> None:
super().__init__()
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
if __name__ == "__main__":
app = QApplication(sys.argv)
window = canvastrying()
sys.exit(app.exec_())
That's my GUI's code:
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(318, 325)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.widget = Canvas(self.centralwidget)
self.widget.setGeometry(QtCore.QRect(10, 20, 291, 231))
self.widget.setStyleSheet("background-color: green;")
self.widget.setObjectName("widget")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 318, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
from tkinter import Canvas
Can we use TkInter's canvas property in PyQt5? If we can, what am I doing wrong?