Updating to use rainbowio.

.pre-commit-config.yaml

@@ -30,5 +30,5 @@ repos:
         name: pylint (examples code)
         description: Run pylint rules on "examples/*.py" files
         entry: /usr/bin/env bash -c
-        args: ['([[ ! -d "examples" ]] || for example in $(find . -path "./examples/*.py"); do pylint --disable=missing-docstring,invalid-name $example; done)']
+        args: ['([[ ! -d "examples" ]] || for example in $(find . -path "./examples/*.py"); do pylint --disable=missing-docstring,invalid-name,consider-using-f-string $example; done)']
         language: system

adafruit_led_animation/color.py

@@ -23,6 +23,9 @@ Implementation Notes
 * Adafruit CircuitPython firmware for the supported boards:
   https://circuitpython.org/downloads
 """
+# Makes colorwheel() available.
+from rainbowio import colorwheel  # pylint: disable=unused-import
+
 RED = (255, 0, 0)
 """Red."""
 YELLOW = (255, 150, 0)
@@ -70,29 +73,6 @@ RAINBOW = (RED, ORANGE, YELLOW, GREEN, BLUE, PURPLE)
 """RAINBOW is a list of colors to use for cycling through.
 Includes, in order: red, orange, yellow, green, blue, and purple."""
 
-try:
-    try:
-        # Backwards compatibility for 5.3.0 and prior
-        from _pixelbuf import colorwheel  # pylint: disable=unused-import
-    except ImportError:
-        from _pixelbuf import wheel as colorwheel  # pylint: disable=unused-import
-except ImportError:
-
-    def colorwheel(pos):
-        """Colorwheel is built into CircuitPython's _pixelbuf. A separate colorwheel is included
-        here for use with CircuitPython builds that do not include _pixelbuf, as with some of the
-        SAMD21 builds. To use: input a value 0 to 255 to get a color value.
-        The colours are a transition from red to green to blue and back to red."""
-        if pos < 0 or pos > 255:
-            return 0, 0, 0
-        if pos < 85:
-            return int(255 - pos * 3), int(pos * 3), 0
-        if pos < 170:
-            pos -= 85
-            return 0, int(255 - pos * 3), int(pos * 3)
-        pos -= 170
-        return int(pos * 3), 0, int(255 - (pos * 3))
-
 
 def calculate_intensity(color, intensity=1.0):
     """