add flake8 job

.github/workflows/lint.yml

@@ -0,0 +1,20 @@
+name: Lint
+
+on: [push]
+
+jobs:
+  flake8:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python
+      uses: actions/setup-python@v3
+      with:
+        python-version: 3.9
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install flake8
+    - name: Analysing the code with flake8
+      run: |
+        flake8

lib/rgba.py

@@ -48,7 +48,7 @@ def alpha_channel(alpha):
             return int(alpha, 16) if alpha else 0xFF
 
         m = self.color_pattern.match(s)
-        assert(m is not None)
+        assert (m is not None)
         if m.group(1):
             return int(s[1:3], 16), int(s[3:5], 16), int(s[5:7], 16), alpha_channel(m.group(2))
         else:
@@ -96,10 +96,10 @@ def get_luminance(self):
         return clamp(round_int(0.299 * self.r + 0.587 * self.g + 0.114 * self.b), 0, 255)
 
     def get_true_luminance(self):
-        """Get true liminance."""
+        """Get true luminance."""
 
-        l = self.tohls()[1]
-        return clamp(round_int(l * 255.0), 0, 255)
+        lum = self.tohls()[1]
+        return clamp(round_int(lum * 255.0), 0, 255)
 
     def alpha(self, factor):
         """Adjust alpha."""
@@ -125,8 +125,8 @@ def luminance(self, factor):
         """Get true luminance."""
 
         h, l, s = self.tohls()
-        l = clamp(l + factor - 1.0, 0.0, 1.0)
-        self.fromhls(h, l, s)
+        lum = clamp(l + factor - 1.0, 0.0, 1.0)
+        self.fromhls(h, lum, s)
 
     def tohsv(self):
         """Convert to HSV color format."""
@@ -146,10 +146,10 @@ def tohls(self):
 
         return rgb_to_hls(self.r * RGB_CHANNEL_SCALE, self.g * RGB_CHANNEL_SCALE, self.b * RGB_CHANNEL_SCALE)
 
-    def fromhls(self, h, l, s):
+    def fromhls(self, h, lum, s):
         """Convert to RGB from HSL."""
 
-        r, g, b = hls_to_rgb(h, l, s)
+        r, g, b = hls_to_rgb(h, lum, s)
         self.r = clamp(round_int(r * 255.0), 0, 255)
         self.g = clamp(round_int(g * 255.0), 0, 255)
         self.b = clamp(round_int(b * 255.0), 0, 255)

lib/util.py

@@ -31,7 +31,7 @@
     \b(?P<hwba>hwb\(\s*(?P<hwba_content>%(float)s\s*,\s*(?:%(percent)s\s*,\s*){2}(?:%(percent)s|%(float)s))\s*\)) |
     \b(?P<gray>gray\(\s*(?P<gray_content>%(float)s|%(percent)s)\s*\)) |
     \b(?P<graya>gray\(\s*(?P<graya_content>(?:%(float)s|%(percent)s)\s*,\s*(?:%(percent)s|%(float)s))\s*\)) |
-    \b(?P<pantone_code>((\d{2}-)?\d{3,5}\s|(black|blue|bright red|cool gray|dark blue|green|magenta|medium purple|orange|pink|process blue|purple|red|reflex blue|rhodamine red|rose gold|silver|violet|warm gray|warm red|yellow)\s(\d{1,5}\s)?|p\s\d{1,3}-\d{1,2}\s)[a-z]{1,3})\b |
+    \b(?P<pantone_code>((\d{2}-)?\d{3,5}\s|(black|blue|bright red|cool gray|dark blue|green|magenta|medium purple|orange|pink|process blue|purple|red|reflex blue|rhodamine red|rose gold|silver|violet|warm gray|warm red|yellow)\s(\d{1,5}\s)?|p\s\d{1,3}-\d{1,2}\s)[a-z]{1,3})\b |  # noqa: E501
     \b(?P<ral_code>RAL\s\d{4})\b
 ''' % COLOR_PARTS
 
@@ -248,8 +248,8 @@ def translate_color(m, use_hex_argb=False, decode=False):
             hue = hue % 360.0
         h = hue / 360.0
         s = clamp(float(content[1].strip('%')), 0.0, 100.0) / 100.0
-        l = clamp(float(content[2].strip('%')), 0.0, 100.0) / 100.0
-        rgba.fromhls(h, l, s)
+        lum = clamp(float(content[2].strip('%')), 0.0, 100.0) / 100.0
+        rgba.fromhls(h, lum, s)
         color = rgba.get_rgb()
     elif m.group('hsla'):
         if decode:
@@ -262,8 +262,8 @@ def translate_color(m, use_hex_argb=False, decode=False):
             hue = hue % 360.0
         h = hue / 360.0
         s = clamp(float(content[1].strip('%')), 0.0, 100.0) / 100.0
-        l = clamp(float(content[2].strip('%')), 0.0, 100.0) / 100.0
-        rgba.fromhls(h, l, s)
+        lum = clamp(float(content[2].strip('%')), 0.0, 100.0) / 100.0
+        rgba.fromhls(h, lum, s)
         color = rgba.get_rgb()
         if content[3].endswith('%'):
             alpha, alpha_dec = alpha_percent_normalize(content[3])

tox.ini

@@ -0,0 +1,2 @@
+[flake8]
+max-line-length = 120