Add linters to Travis: Python

.travis.yml

@@ -21,11 +21,19 @@ before_install:
   - pip install pip --upgrade
   - pip install git+https://github.com/timothyb89/dbuild.git
   - pip install google-cloud-storage
+  - pip install flake8 flake8-blind-except flake8-builtins flake8-pep3101 flake8-coding
+  - pip install pylint
   - docker --version
   - docker-compose --version
 
 jobs:
   include:
+    - stage: lint-shellcheck
+      script: bash -c 'shopt -s globstar; shellcheck **/*.sh'
+    - stage: linting-flake8
+      script: flake8
+    - stage: linting-pylint
+      script: pylint --rcfile=setup.cfg *
     - stage: lint-shellcheck
       script: bash -c 'shopt -s globstar; shellcheck **/*.sh'
     - stage: metrics-pipeline

setup.cfg

@@ -0,0 +1,21 @@
+[flake8]
+# D203  1 blank line required before class docstring
+# H201  no 'except:' at least use 'except Exception:'
+# H302  import only modules
+# H405  multi line docstring summary not separated with an empty line
+ignore = D203,H201,H302,H405
+# H106: Don’t put vim configuration in source files
+# H203: Use assertIs(Not)None to check for None
+enable-extensions = H106,H203
+max-complexity = 50
+max-line-length = 120
+exclude =.env,.git,doc,*lib/python*,build,dist,*.egg
+show-source = True
+builtins = _
+
+[pylint]
+disable = C0103,C0111,F0010
+ignore = .env,.git,doc,*lib/python*,build,dist,*.egg
+ignore-docstrings = yes
+output-format = parseable
+max-line-length = 120