Add more flake8 tests

README.md

@@ -14,7 +14,7 @@ action "Python Syntax Checker" {
 }
 ```
 ## Flake8 finds Python 3 syntax errors and undefined names
-$ __flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics__
+$ __flake8 . --count --select=E9,F63,F72,F82 --show-source --statistics__
 
 __E901,E999,F821,F822,F823__ are the "_showstopper_" [flake8](http://flake8.pycqa.org) issues that can halt the runtime with a SyntaxError, NameError, etc. These 5 are different from most other flake8 issues which are merely "style violations" -- useful for readability but they do not effect runtime safety.
 * F821: undefined name `name`