fixed error + pylint-tweaks

Author: bablokb

adafruit_display_shapes/sparkline.py

@@ -100,6 +100,7 @@ def __init__(
  self._x = x
  self._y = y
  self._redraw = True # _redraw: redraw primitives
+ self._last = [] # _last: last point of sparkline
 
  super().__init__(x=x, y=y) # self is a group of lines
 
@@ -182,7 +183,7 @@ def _plotline(
  self.append(Line(x_1, y_1, x_2, y_2, self.color)) # plot the line
  self._last = [x_2, value]
 
- # pylint: disable= too-many-branches, too-many-nested-blocks
+ # pylint: disable= too-many-branches, too-many-nested-blocks, too-many-locals, too-many-statements
 
  def update(self) -> None:
  """Update the drawing of the sparkline."""
@@ -271,8 +272,6 @@ def update(self) -> None:
  adj_last_value,
  adj_x_2,
  adj_value,
- self.y_bottom,
- self.y_top,
  )
 
  last_value = value # store value for the next iteration