How to promote the ui file to the QtGraphviews window?

[EClassBox]

I already made a ui file used 2 classess.
Chart.py

import sys, time, datetime, pyupbit
import pandas as pd
import finplot as fplt
from PyQt5 import QtWidgets, uic
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *

# candle chart setting
fplt.display_timezone = datetime.timezone.utc
fplt.candle_bull_color = "#FF0000"
fplt.candle_bull_body_color = "#FF0000"
fplt.candle_bear_color = "#0000FF"

chart = uic.loadUiType("chart.ui")[0]
class Worker(QThread):
    timeout = pyqtSignal(pd.DataFrame)
    def __init__(self):
        super().__init__()

    def get_ohlcv(self):
        self.df = pyupbit.get_ohlcv(ticker="KRW-XRP", interval="minute1")
        self.df = self.df[['open', 'high', 'low', 'close']]
        self.df.columns = ['Open', 'High', 'Low', 'Close']

    def run(self):
        self.get_ohlcv()

        while True:
            data3 = pyupbit.get_current_price("KRW-XRP", verbose=True)
            price3 = data3['trade_price']
            time_stamp = data3['trade_timestamp'] / 1000
            cur_min_time_stamp = time_stamp - time_stamp % (60)
            cur_min_dt = datetime.datetime.fromtimestamp(cur_min_time_stamp)

            if cur_min_dt > self.df.index[-1]:
                self.get_ohlcv()
            else:
                self.df.iloc[-1]['Close'] = price3
                if price3 > self.df.iloc[-1]['High']:
                    self.df.iloc[-1]['High'] = price3
                if price3 < self.df.iloc[-1]['High']:
                    self.df.iloc[-1]['Low'] = price3

            CurrentPrice3 = pyupbit.get_current_price("KRW-XRP")
            print("Current Price of KRW-XRP :", CurrentPrice3)

            self.timeout.emit(self.df)
            time.sleep(1)

class MyWindow(QWidget, chart):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.df = None
        self.plot = None
        
        self.w = Worker()
        self.w.timeout.connect(self.update_data)
        self.w.start()

        self.timer = QTimer(self)
        self.timer.start(1000)
        self.timer.timeout.connect(self.update)

        self.ax = fplt.create_plot(init_zoom_periods=100)
        self.axs = [self.ax]

        self.gridLayout_2.addWidget(self.ax.vb.win, 0, 0)

    def update(self):
        if self.df is not None:
            if self.plot is None:
                self.plot = fplt.candlestick_ochl(self.df[['Open', 'Close', 'High', 'Low']])
                fplt.show(qt_exec=False)
            else:
                self.plot.update_data(self.df[['Open', 'Close', 'High', 'Low']])

    @pyqtSlot(pd.DataFrame)
    def update_data(self, df):
        self.df = df

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MyWindow()
    window.show()
    app.exec_()

and chart.ui has 1 gridLayout in 1 graphicsView

then I' want to print out the chart.ui on the QGraphicsview screen in the main.ui.
But I don't know about how to promote QGrphicsview widget and write the Python code.
Could you please tell me what I should do?