test: add running of pylint

Now tox will run pylint.  The .pylintrc file sets pylint to only produce
errors, and will ignore certain classes that are known problematic (six).

2 files changed, 8 insertions, 2 deletions

diff --git a/cloudinit/net/network_state.py b/cloudinit/net/network_state.py
index 701aaa4e..692b6007 100644
--- a/cloudinit/net/network_state.py
+++ b/cloudinit/net/network_state.py
@@ -214,7 +214,7 @@ class NetworkStateInterpreter(object):
         return util.yaml_dumps(self._network_state)
 
     def as_dict(self):
-        return {'version': self.version, 'config': self.config}
+        return {'version': self._version, 'config': self._config}
 
     def get_network_state(self):
         ns = self.network_state
@@ -611,7 +611,8 @@ class NetworkStateInterpreter(object):
             self.handle_vlan(vlan_cmd)
 
     def handle_wifis(self, command):
-        raise NotImplemented('NetworkState V2: Skipping wifi configuration')
+        raise NotImplementedError("NetworkState V2: "
+                                  "Skipping wifi configuration")
 
     def _v2_common(self, cfg):
         LOG.debug('v2_common: handling config:\n%s', cfg)
diff --git a/cloudinit/net/renderer.py b/cloudinit/net/renderer.py
index a5b2b573..c68658dc 100644
--- a/cloudinit/net/renderer.py
+++ b/cloudinit/net/renderer.py
@@ -5,6 +5,7 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
+import abc
 import six
 
 from .network_state import parse_net_config_data
@@ -37,6 +38,10 @@ class Renderer(object):
                                                  iface['mac_address']))
         return content.getvalue()
 
+    @abc.abstractmethod
+    def render_network_state(self, network_state, target=None):
+        """Render network state."""
+
     def render_network_config(self, network_config, target=None):
         return self.render_network_state(
             network_state=parse_net_config_data(network_config), target=target)