Flake8 setup and dev install

pytest.ini

@@ -0,0 +1,2 @@
+[pytest]
+flake8-max-line-length = 99

setup.py

@@ -9,6 +9,15 @@ setup(name='preserve',
       license='MIT',
       packages=[],
       py_modules=['preserve'],
+      extras_require={
+          'dev': [
+              'pylint',
+              'autopep8',
+              'pytest',
+              'pytest-flake8',
+              'pytest-cov'
+          ]
+      },
       long_description=open('README.md').read(),
       long_description_content_type='text/markdown'
       )

tests/test_preserve.py

@@ -19,7 +19,8 @@ class PreservableClass(PlainClass):
 
 @pytest.fixture
 def primitive_data():
-    return {'key1': ["item1", {"d2k1": "val1", "d2k2": 2}, {"d3k1": "val1", "d3k2": True}, "test str"]}
+    return {'key1': ["item1", {"d2k1": "val1", "d2k2": 2},
+                     {"d3k1": "val1", "d3k2": True}, "test str"]}
 
 
 def obj_attrs_and_type_equal(obj1, obj2):