Run flake8 in travis

Author: hukkinj1

.flake8

@@ -4,3 +4,4 @@ extend-ignore =
     E203,
     # E501: line too long
     E501
+exclude = */site-packages/*

.travis.yml

@@ -17,14 +17,15 @@ install:
     - pip install tox-travis
     - |
       if [[ $TRAVIS_PYTHON_VERSION == '3.6' ]]; then
-        pip install black mypy
+        pip install black flake8 mypy
       fi
 
 script:
     - python setup.py install
     - |
       if [[ $TRAVIS_PYTHON_VERSION == '3.6' ]]; then
         black --check . &&
+        flake8 . &&
         mypy .
       fi
     - tox

generate_vectors.py

@@ -30,9 +30,9 @@ def process(data, lst):
 
         # Generate corner cases
         data = []
-        for l in range(16, 32 + 1, 8):
+        for length in range(16, 32 + 1, 8):
             for b in ["00", "7f", "80", "ff"]:
-                process(b * l, out[lang])
+                process(b * length, out[lang])
 
         # Generate random seeds
         for i in range(12):