Реализация matplotlib в qt

from PyQt5.QtWidgets import QWidget, QApplication, QVBoxLayout
import sys
import unt
from matplotlib.backends.backend_qt5agg import FigureCanvasAgg
from matplotlib.figure import Figure
import numpy as np
 
class MatplotlibWidget (QWidget):
    def __init__(self, parent=None):
        super(MatplotlibWidget, self).__init__(parent)
        self.figure = Figure()
        self.canvas = FigureCanvasAgg(self.figure)
        self.axis = self.figure.add_subplot(111)
 
        self.layoutvertical = QVBoxLayout(self)
        self.layoutvertical.addWidget(self.canvas)
        
class MainWidget(QWidget, unt.Ui_MainWindow):
    def __init__(self):
        super(MainWidget, self).__init__()
        self.setupUi(self)
        self.init_widget()
        self.pushButton.clicked.connect(self.plot_widget)
 
    def init_widget(self):
        self.matplotlibwidget = MatplotlibWidget()
        self.layoutvertical = QVBoxLayout(self.widget)
        self.layoutvertical.addWidget(self.matplotlibwidget)
 
    def plot_widget(self):
        self.matplotlibwidget.axis.clear()
        x = np.random.random(10)
        y = np.random.random(10)
        txts = ["A1", "A2", "A3", "A4", "A5", "A6", "A7", "A8", "A9", "A10"]
        self.matplotlibwidget.axis.scatter(x, y)
        for index, txt in enumerate (txts):
            self.matplotlibwidget.axis.annotate(txt, (x[index], y[index]))
        self.matplotlibwidget.canvas.draw()
 
if __name__ == "__name__":
    app = QApplication(sys.argv)
    w = MainWidget()
    w.show()
    sys.exit(app.exec_())

# -*- coding: utf-8 -*-
 
# Form implementation generated from reading ui file 'unt.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# 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.
 
 
from PyQt5 import QtCore, QtGui, QtWidgets
 
 
class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.widget = QtWidgets.QWidget(self.centralwidget)
        self.widget.setGeometry(QtCore.QRect(20, 20, 501, 361))
        self.widget.setObjectName("widget")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(680, 510, 93, 28))
        self.pushButton.setObjectName("pushButton")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
        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"))
        self.pushButton.setText(_translate("MainWindow", "PushButton"))

self.setLayout(layoutvertical)