Fixing pep8 issues for the future

dev.py

@@ -3,11 +3,7 @@ from __future__ import absolute_import
 import os
 import subprocess
 
-if 'PUPPETBOARD_SETTINGS' not in os.environ:
-    os.environ['PUPPETBOARD_SETTINGS'] = os.path.join(
-        os.getcwd(), 'settings.py'
-    )
-
+# Set PUPPETBOARD_SETTINGS to your settings.py
 from puppetboard.app import app
 
 if __name__ == '__main__':

puppetboard/app.py

@@ -203,7 +203,7 @@ def index(env):
         num_nodes_query.add_field(FunctionOperator('count'))
         num_nodes_query.add_query(query)
 
-        if app.config['OVERVIEW_FILTER'] != None:
+        if app.config['OVERVIEW_FILTER'] is not None:
             query.add(app.config['OVERVIEW_FILTER'])
 
         num_resources_query = ExtractOperator()