Is it possible to use FillBetweenItem to fill between two PlotCurveItem's in pyqtgraph?
<p>I'm attempting to fill between two curves that were created using PlotCurveItem in pyqtgraph.</p>

<pre><code>            phigh = self.p2.addItem(pg.PlotCurveItem(x, y, pen = 'k'))           
            plow = self.p2.addItem(pg.PlotCurveItem(x, yy, pen = 'k'))           
            pfill = pg.FillBetweenItem(phigh, plow, brush = br)
            self.p2.addItem(pfill)
</code></pre>

<p>The curve items are plotting properly however there is no fill. </p>

<p>This fixed it.  </p>

<pre><code>            phigh = pg.PlotCurveItem(x, y, pen = 'k')           
            plow = pg.PlotCurveItem(x, yy, pen = 'k')                  
            pfill = pg.FillBetweenItem(ph, plow, brush = br)
            self.p2.addItem(ph)
            self.p2.addItem(plow)
            self.p2.addItem(pfill)
</code></pre>

python python-2.7 pyqtgraph