code: def line(self, x1, y1, x2, y2, color="black", width=1):
          
          return self.tk.create_line(
              x1, y1, x2, y2, 
              width = width,
              fill = "" if color is None else utils.convert_color(color)
              )
docs: Draws a line between 2 points
  
          :param int x1:
              The x position of the starting point.
  
          :param int y1:
              The y position of the starting point.
  
          :param int x2:
              The x position of the end point.
  
          :param int y2:
              The y position of the end point.
  
          :param str color:
              The color of the line. Defaults to `"black"`.
  
          :param int width:
              The width of the line. Defaults to `1`.
  
          :return:
              The id of the line.