Gridlines showing for two axes instead of one

[MudloggerMike]

I modified the code from one of the multiple axes plot examples that I found on the Internet. The plot is embedded in a graphicsView widget that I promoted to a PlotWidget. When I call showGrid for the p1 axis (as shown on line 21 in the code below). I end up with a grid for both p1 and p2 axes. I am sure there is a way to plot just the grid for p1. I've looked through all of the docs and posts and can't find anything about this. Any help would be greatly appreciated.

#imports
from PyQt4 import QtGui
#from PyQt4 import QtCore
import ui_test  #Gui File
import sys
import pyqtgraph as pg

class Gui(QtGui.QMainWindow, ui_test.Ui_MainWindow):       
    def __init__(self):       
        super(self.__class__, self).__init__()       
        self.setupUi(self) 
        self.pg_plot()
        self.updateViews()
        self.plotdata()
       
   
    def pg_plot(self):         
        ## Switch to using white background and black foreground
        self.bepx = 30
        self.bepy = 800
        pg.setConfigOption('background', 'w')
        pg.setConfigOption('foreground', 'k') 
        
        self.p1 = pg.PlotItem()
       
       
        self.graphicsView.setCentralWidget(self.p1)
        self.p1.showGrid(x = True, y = True ,alpha = 0.3) 
        lr = pg.LinearRegionItem([20,40], movable = False, brush = '#ffcccc33')  #Set linear region
        self.p1.addItem(lr)
        ## create a new ViewBox, link the right axis to its coordinate system
        self.p2 = pg.ViewBox()
       
        self.p1.showAxis('right')
        self.p1.scene().addItem(self.p2)
        self.p1.getAxis('right').linkToView(self.p2)
        self.p2.setXLink(self.p1)
        self.p1.getAxis('right').setLabel('eff', color='g')
        pg.LinearRegionItem([20,40])
       
        ## create third ViewBox.
        ## this time we need to create a new axis as well.
        self.p3 = pg.ViewBox()
        self.ax3 = pg.AxisItem('right')
        self.p1.layout.addItem(self.ax3,2,3)
        self.p1.scene().addItem(self.p3)
        self.ax3.linkToView(self.p3)
        self.p3.setXLink(self.p1)
        self.ax3.setZValue(-10000)
        self.ax3.setLabel('Power', color='r')   
       
    ## Handle view resizing
    def updateViews(self):
        ## view has resized; update auxiliary views to match
       
        self.p2.setGeometry(self.p1.vb.sceneBoundingRect())
        self.p3.setGeometry(self.p1.vb.sceneBoundingRect())
       
        ## need to re-update linked axes since this was called
        ## incorrectly while views had different shapes.
        ## (probably this should be handled in ViewBox.resizeEvent)
        self.p2.linkedViewChanged(self.p1.vb, self.p2.XAxis)
        self.p3.linkedViewChanged(self.p1.vb, self.p3.XAxis)
      
    def plotdata(self):
        #Plot Datapoints
        self.p1.plot([0,10,20,30,40,50], [1,2,4,8,16,32], pen = 'g')
        self.p2.addItem(pg.PlotCurveItem([0,10,20,30,40,50], [10,20,40,80,40,20], pen='b'))
        self.p3.addItem(pg.PlotCurveItem([0,10,20,30,40,50], [3200,1600,800,2500,200,100], pen='r'))
        self.bepx = 50
        self.bepy = 1000
   
def main():
    app = QtGui.QApplication(sys.argv)
    form = Gui()
    form.show() 
    app.exec_()
   
if __name__ == '__main__':  # if we're running file directly and not importing it
    main()  # run the main function

[Rajab Legnain]

remove this line

self.p1.showGrid(x = True, y = True ,alpha = 0.3) 

and use this

self.p1.getAxis("left").setGrid(255)