flake8: code meanings (#6481)

setup.cfg

@@ -28,21 +28,21 @@ format = pylint
 # see: https://www.flake8rules.com/
 ignore =
     E731  # Do not assign a lambda expression, use a def
-    F405
-    E402
-    F841
-    E741
-    F821
-    E722
-    F401
-    W504
-    E127
-    W504
-    E231
-    E501
-    F403
-    E302
-    F541
+    F405  # name may be undefined, or defined from star imports: module
+    E402  # module level import not at top of file
+    F841  # local variable name is assigned to but never used
+    E741  # do not use variables named ‘l’, ‘O’, or ‘I’
+    F821  # undefined name name
+    E722  # do not use bare except, specify exception instead
+    F401  # module imported but unused
+    W504  # line break after binary operator
+    E127  # continuation line over-indented for visual indent
+    W504  # line break after binary operator
+    E231  # missing whitespace after ‘,’, ‘;’, or ‘:’
+    E501  # line too long
+    F403  # ‘from module import *’ used; unable to detect undefined names
+    E302  # expected 2 blank lines, found 0
+    F541  # f-string without any placeholders
 
 
 [isort]