Add Travis CI integration for flake8 linting. (#2)

* Add flake8 linting.

* Fix lint failures.

* Add travis integration.

.travis.yml

@@ -0,0 +1,8 @@
+language: python
+python:
+- '3.6'
+install:
+- pip install -e .
+- pip install -r test-requirements.txt
+script:
+- make test

Makefile

@@ -0,0 +1,4 @@
+test: test_lint
+
+test_lint:
+	flake8

multiprocessing_dag/__init__.py

@@ -1,6 +1,5 @@
 import logging
 import multiprocessing
-import random
 import time
 
 logger = logging.getLogger(__name__)
@@ -91,7 +90,7 @@ def run(self):
             if not result:
                 self.logger.warning(f"Command failure in task '{self.task.uri()}'.")
                 success = False
-        except Exception as e:  # TODO let KeyboardInterrupt and others bubble up
+        except Exception:  # TODO let KeyboardInterrupt and others bubble up
             self.logger.exception(f"Unhandled exception in task '{self.task.uri()}'.")
             success = False
         self.status_queue.put(success)

setup.cfg

@@ -0,0 +1,4 @@
+[flake8]
+format = pylint
+exclude = .svc,CVS,.bzr,.hg,.git,__pycache__,venv
+max-line-length = 120

test-requirements.txt

@@ -0,0 +1 @@
+flake8