docs: def make_code(self):
          """This method returns the best possible QR code."""
          from copy import deepcopy
  
          #Get the size of the underlying matrix
          matrix_size = tables.version_size[self.version]
  
          #Create a template matrix we will build the codes with
          row = [' ' for x in range(matrix_size)]
          template = [deepcopy(row) for x in range(matrix_size)]
  
          #Add mandatory information to the template
          self.add_detection_pattern(template)
          self.add_position_pattern(template)
          self.add_version_pattern(template)
  
          #Create the various types of masks of the template
          self.masks = self.make_masks(template)
  
          self.best_mask = self.choose_best_mask()
          self.code = self.masks[self.best_mask]