代码：

# //  /Users/zhangzhiqi/Library/Mobile Documents/com~apple~CloudDocs/公司项目/et_left/TopangaETSolution/TopangaET/Pyqt5环形图2.py
#  //  Copyright (c) 2023.
#  //  @Time    : 2023/2/9   18:29:43
#  //  @Author : 张稚琦
#  //  @Address: 湖北理工学院腾龙公寓 5620
#  //  @Email   : zhang@zhang.mba / zhangzhiqi828@gmail.com / zhangzhiqi@lh83.onmicrosoft.com / 2272358828@qq.com
#  //  @File      : Pyqt5环形图2.py
#  //  @LastModified: 2023/2/9 下午6:29
#  //  @ProjectName : TopangaETSolution #-*-coding:utf-8-*-
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
import PyQt5.QtChart as QtCharts

app = QApplication(sys.argv)
window = QMainWindow()
window.show()

# 创建环形图
series = QtCharts.QPieSeries()
series.append("鹰诺", 10)
series.append("科瑞", 30)
series.append("新能源", 20)
series.append("光电", 40)

chart = QtCharts.QChart()
chart.addSeries(series)
chart.setTitle("Simple piechart example")

# 将图形显示在 PyQt5 窗口中
chartView = QtCharts.QChartView(chart)
window.setCentralWidget(chartView)

sys.exit(app.exec_())

效果：