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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def forward(self,pixx,pixy):
 """ Transform the input pixx,pixy positions in the input frame to pixel positions in the output frame. This method gets passed to the drizzle algorithm. """

        # This matches WTRAXY results to better than 1e-4 pixels.
        skyx,skyy = self.input.all_pix2world(pixx,pixy,self.origin)
        result= self.output.wcs_world2pix(skyx,skyy,self.origin)
        return result