def save(self, doc):
        if doc.id:
            return self.update(doc)
        else:
            return self.insert(doc)
def stroke_rectangle(self, x, y, w, h):
		self.line(x,y,w,True)
		self.line(x,y+h-1,w,True)
		self.line(x,y,h,False)
		self.line(x+w-1,y,h,False)