pylint dupe fix: refactor pixlematrix and matrix_featherwing to use superclass

Author: FoamyGuy

adafruit_featherwing/auto_writeable.py

@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2021 Tim Cocks for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+"""
+`adafruit_featherwing.auto_writeable`
+====================================================
+
+Superclass for the helpers pixelmatrix and matrix_featherwing
+
+* Author(s): Tim Cocks
+"""
+
+
+class AutoWriteable:
+    """Superclass for matrix_featherwing and pixelmatrix."""
+
+    def __init__(self):
+        self._auto_write = True
+
+    @property
+    def auto_write(self):
+        """
+        Whether or not we are automatically updating
+        If set to false, be sure to call show() to update
+        """
+        return self._auto_write
+
+    @auto_write.setter
+    def auto_write(self, write):
+        if isinstance(write, bool):
+            self._auto_write = write

adafruit_featherwing/matrix_featherwing.py

@@ -18,21 +18,24 @@
 import board
 import adafruit_ht16k33.matrix as matrix
 
+from adafruit_featherwing.auto_writeable import AutoWriteable
 
-class MatrixFeatherWing:
+
+class MatrixFeatherWing(AutoWriteable):
     """Class representing an `Adafruit 8x16 LED Matrix FeatherWing
     <https://www.adafruit.com/product/3155>`_.
 
     Automatically uses the feather's I2C bus."""
 
     def __init__(self, address=0x70, i2c=None):
+
         if i2c is None:
             i2c = board.I2C()
         self._matrix = matrix.Matrix16x8(i2c, address)
         self._matrix.auto_write = False
         self.columns = 16
         self.rows = 8
-        self._auto_write = True
+        super().__init__()
 
     def __getitem__(self, key):
         """
@@ -125,19 +128,6 @@ def shift_down(self, rotate=False):
         self._matrix.shift_down(rotate)
         self._update()
 
-    @property
-    def auto_write(self):
-        """
-        Whether or not we are automatically updating
-        If set to false, be sure to call show() to update
-        """
-        return self._auto_write
-
-    @auto_write.setter
-    def auto_write(self, write):
-        if isinstance(write, bool):
-            self._auto_write = write
-
     @property
     def blink_rate(self):
         """

adafruit_featherwing/pixelmatrix.py

@@ -16,9 +16,10 @@
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_FeatherWing.git"
 
 # pylint: disable-msg=unsubscriptable-object, unsupported-assignment-operation
+from adafruit_featherwing.auto_writeable import AutoWriteable
 
 
-class PixelMatrix:
+class PixelMatrix(AutoWriteable):
     """Base Class for DotStar and NeoPixel FeatherWings
 
     The feather uses pins D13 and D11"""
@@ -27,7 +28,7 @@ def __init__(self):
         self.rows = 0
         self.columns = 0
         self._matrix = None
-        self._auto_write = True
+        super().__init__()
 
     def __setitem__(self, indices, value):
         """
@@ -158,19 +159,6 @@ def shift_down(self, rotate=False):
             self._matrix[(self.rows - 1) * self.columns + x] = last_pixel
         self._update()
 
-    @property
-    def auto_write(self):
-        """
-        Whether or not we are automatically updating
-        If set to false, be sure to call show() to update
-        """
-        return self._auto_write
-
-    @auto_write.setter
-    def auto_write(self, write):
-        if isinstance(write, bool):
-            self._auto_write = write
-
     @property
     def brightness(self):
         """