import sys from PyQt5.QtGui import QPainter, QPen from PyQt5.QtCore import Qt from PyQt5.QtWidgets import QApplication, QMainWindow from PyQt5.QtChart import QChart, QChartView, QPieSeries, QPieSlice class DemoChartPieSeries(QMainWindow): def __init__(self, parent=None): super(DemoChartPieSeries, self).__init__(parent) # 设置窗口标题 self.setWindowTitle('实战 Qt for Python: QChart饼图演示') # 设置窗口大小 self.resize(480, 360) self.createChart() def createChart(self): #设置饼图数据 pieSeries = QPieSeries() pieSeries.append('Jane', 1) pieSeries.append('Joe', 2) pieSeries.append('Andy', 3) pieSeries.append('Barbara', 4) pieSeries.append('Axel', 5) pieSlice = pieSeries.slices()[1] pieSlice.setExploded() pieSlice.setLabelVisible() pieSlice = pieSeries.slices()[2] pieSlice.setExploded() pieSlice.setLabelVisible() #创建图表 chart = QChart() chart.addSeries(pieSeries) chart.setTitle('简单的饼图示例') chart.legend().hide() #图表视图 chartView = QChartView(chart) chartView.setRenderHint(QPainter.Antialiasing) self.setCentralWidget(chartView) if __name__ == '__main__': app = QApplication(sys.argv) window = DemoChartPieSeries() window.show() sys.exit(app.exec()) 把它改成QW

idgets.QMainWindow的子类，并将其命名为DemoChartPieSeries即可，代码如下：

import sys
from PyQt5.QtGui import QPainter, QPen
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget
from PyQt5.QtChart import QChart, QChartView, QPieSeries, QPieSlice

class DemoChartPieSeries(QMainWindow):
def __init__(self, parent=None):
super(DemoChartPieSeries, self).__init__(parent)

# 设置窗口标题
self.setWindowTitle('实战 Qt for Python: QChart饼图演示')

# 设置窗口大小
self.resize(480, 360)

self.createChart()

def createChart(self):
#设置饼图数据
pieSeries = QPieSeries()
pieSeries.append('Jane', 1)
pieSeries.append('Joe', 2)
pieSeries.append('Andy', 3)
pieSeries.append('Barbara', 4)
pieSeries.append('Axel', 5)

pieSlice = pieSeries.slices()[1]
pieSlice.setExploded()
pieSlice.setLabelVisible()
pieSlice = pieSeries.slices()[2]
pieSlice.setExploded()
pieSlice.setLabelVisible()

#创建图表
chart = QChart()
chart.addSeries(pieSeries)
chart.setTitle('简单的饼图示例')
chart.legend().hide()

#图表视图
chartView = QChartView(chart)
chartView.setRenderHint(QPainter.Antialiasing)

centralWidget = QWidget()
self.setCentralWidget(centralWidget)
mainLayout = QVBoxLayout(centralWidget)
mainLayout.addWidget(chartView)

if __name__ == '__main__':
app = QApplication(sys.argv)
window = DemoChartPieSeries()
window.show()
sys.exit(app.exec())