code: def getdata(self, blc=(), trc=(), inc=()):
          
          return self._getdata(self._adjustBlc(blc),
                               self._adjustTrc(trc),
                               self._adjustInc(inc))
docs: Get image data.
  
          Using the arguments blc (bottom left corner), trc (top right corner),
          and inc (stride) it is possible to get a data slice.
  
          The data is returned as a numpy array. Its dimensionality is the same
          as the dimensionality of the image, even if an axis has length 1.