import sys
from PySide.QtCore import *
from PySide.QtGui import *
import pyqtgraph as pg


class GraphWindow(QMainWindow):

    def __init__(self, parent = None):
        
        super(GraphWindow, self).__init__(parent)
        
        ##1 Create a PlotWidget
        pw = pg.PlotWidget()

        ##1 Set the widget in the window
        self.setCentralWidget(pw)

        ##1 Call plotItem
        p1 = pw.plotItem

        ##1 Draw a scatter plot and a line graph
        p1.addItem(pg.PlotCurveItem(x = [0, 1, 2, 3 ,4], 
                                    y = [0, 1, 2, 3 ,4]))
        p1.addItem(pg.ScatterPlotItem(x = [0, 1, 2, 3 ,4], 
                                      y = [4, 3, 2, 1, 0]))


if __name__ == '__main__':
    #Create a Qt Application
    app = QApplication(sys.argv)
    #Create and display form
    mainWin = GraphWindow()
    mainWin.show()
    #Start the main loop of Qt
    sys.exit(app.exec_())

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