I apologize if it has already been reported but I was unable to find similar issue reported using "search".

Maybe just add:
    def moveto(self, tagOrId, xPos, yPos):
        """Move the items given by tagOrId in the canvas coordinate  
        space so that the first coordinate pair of the bottommost 
        item with tag tagOrId is located at position (xPos,yPos). 
        xPos and yPos may be the empty string, in which case the        
        corresponding coordinate will be unchanged. All items matching
        tagOrId remain in the same positions relative to each other.    
        This command returns an empty string. 
        """
        return self.tk.call(self._w, 'moveto', tagOrId, xPos, yPos)