flake8: add config

This adds a flake8 config that is compatible with black. Also fix flake8
complaints outside of the bricks/ev3dev/modules/ directory.

Fixes: pybricks/support#309

Author: dlech

.flake8

@@ -0,0 +1,7 @@
+
+# https://black.readthedocs.io/en/stable/compatible_configs.html#flake8
+
+[flake8]
+max-line-length = 99
+extend-ignore = E203, W503
+exclude = .git,.venv,build,micropython,lib,manifest.py

tests/pup/hub/status_light.py

@@ -3,7 +3,7 @@
 
 # Press the stop button to advance to the next color
 
-from pybricks.hubs import *
+from pybricks.hubs import *  # noqa: F401, F403
 from pybricks.parameters import Color
 from pybricks.tools import wait
 

tests/pup/hub/status_light_animatinon.py

@@ -1,6 +1,6 @@
 # Should be able to smoothly transition between all colors.
 
-from pybricks.hubs import *
+from pybricks.hubs import *  # noqa: F401, F403
 from pybricks.parameters import Color
 from pybricks.tools import wait
 

tests/pup/motors/gears.py

@@ -8,7 +8,7 @@
 """
 
 from pybricks.pupdevices import Motor
-from pybricks.parameters import Port, Stop
+from pybricks.parameters import Port
 from pybricks.tools import wait
 
 

tools/metadata.py

@@ -71,14 +71,14 @@ def generate(
     flash_length = None  # Size of firmware area of flash memory
     user_start = None  # Starting address of user .mpy file
 
-    for l in map_file.readlines():
-        match = re.match(r"^FLASH\s+(0x[0-9A-Fa-f]{8,16})\s+(0x[0-9A-Fa-f]{8,16})", l)
+    for line in map_file.readlines():
+        match = re.match(r"^FLASH\s+(0x[0-9A-Fa-f]{8,16})\s+(0x[0-9A-Fa-f]{8,16})", line)
         if match:
             flash_origin = int(match[1], base=0)
             flash_length = int(match[2], base=0)
             continue
 
-        match = re.match(r"^\.user\s+(0x[0-9A-Fa-f]{8,16})", l)
+        match = re.match(r"^\.user\s+(0x[0-9A-Fa-f]{8,16})", line)
         if match:
             user_start = int(match[1], base=0)
             continue