在pyqt4的x轴上使用散点图项目中的时间

import sys
from PyQt4 import QtGui, QtCore
import matplotlib.pyplot as plt

class MainWindow(QtGui.QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setWindowTitle("Scatter Plot")
        self.setGeometry(100, 100, 800, 600)

class PlotWidget(QtGui.QWidget):
    def __init__(self):
        super(PlotWidget, self).__init__()

    def paintEvent(self, event):
        super(PlotWidget, self).paintEvent(event)
        painter = QtGui.QPainter(self)
        painter.setRenderHint(QtGui.QPainter.Antialiasing)

        # 生成随机数据
        x = [1, 2, 3, 4, 5]
        y = [10, 20, 30, 40, 50]

        # 绘制散点图
        for i in range(len(x)):
            painter.setPen(QtGui.QPen(QtGui.QColor(0, 0, 0)))
            painter.setBrush(QtGui.QBrush(QtGui.QColor(255, 0, 0)))
            painter.drawEllipse(QtCore.QPointF(x[i] * 100, y[i] * 10), 5, 5)

        self.plot_widget = PlotWidget()
        self.setCentralWidget(self.plot_widget)
        self.show()

if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    main_window = MainWindow()
    sys.exit(app.exec_())