def train(self):
    """
    Train the pair layer and pooling layer.
    """
    for iDriving, cDriving in enumerate(self.drivingOperandSDRs):
      minicolumnSDR = self.minicolumnSDRs[iDriving]
      self.pairLayerProximalConnections.associate(minicolumnSDR, cDriving)
      for iContext, cContext in enumerate(self.contextOperandSDRs):
        iResult = (iContext + iDriving) % self.numLocations
        cResult = self.resultSDRs[iResult]
        self.pairLayer.compute(minicolumnSDR, basalInput=cContext)
        cPair = self.pairLayer.getWinnerCells()
        self.poolingLayer.associate(cResult, cPair)
Train the pair layer and pooling layer.