pyqt用QWidget和QtChart库实现显示柱状图

以下是一个使用QWidget和QtChart库显示柱状图的示例代码：

import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtChart import QChart, QChartView, QBarSet, QBarSeries, QBarCategoryAxis

class BarChart(QWidget):
    def __init__(self):
        super().__init__()

        # 创建数据集
        set0 = QBarSet("Set 0")
        set1 = QBarSet("Set 1")
        set2 = QBarSet("Set 2")
        set3 = QBarSet("Set 3")
        set4 = QBarSet("Set 4")
        set5 = QBarSet("Set 5")

        set0 << 1 << 2 << 3 << 4 << 5 << 6
        set1 << 5 << 0 << 0 << 4 << 0 << 7
        set2 << 3 << 5 << 8 << 13 << 8 << 5
        set3 << 5 << 6 << 7 << 3 << 4 << 5
        set4 << 9 << 7 << 5 << 3 << 1 << 2
        set5 << 0 << 0 << 0 << 0 << 0 << 10

        # 创建柱状图系列
        series = QBarSeries()
        series.append(set0)
        series.append(set1)
        series.append(set2)
        series.append(set3)
        series.append(set4)
        series.append(set5)

        # 创建图表和图表视图
        chart = QChart()
        chart.addSeries(series)
        chart.setTitle("Bar Chart Example")
        chart.setAnimationOptions(QChart.SeriesAnimations)
        chart.legend().setVisible(True)
        chart.legend().setAlignment(Qt.AlignBottom)

        # 创建X轴和Y轴
        axisX = QBarCategoryAxis()
        axisX.append(["Jan", "Feb", "Mar", "Apr", "May", "Jun"])
        chart.addAxis(axisX, Qt.AlignBottom)
        series.attachAxis(axisX)

        axisY = chart.createDefaultAxes()
        axisY[0].setTitleText("Value")

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

        # 设置窗口属性
        self.setWindowTitle("Bar Chart Example")
        self.setGeometry(100, 100, 600, 400)

        # 布局管理器
        layout = QVBoxLayout()
        layout.addWidget(chartView)

        # 设置窗口布局
        self.setLayout(layout)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    barChart = BarChart()
    barChart.show()
    sys.exit(app.exec_())

运行代码，将会弹出一个窗口，显示一个柱状图，如下图所示：