diff --git a/bin/ansible b/bin/ansible
index 3fa70918193..22dd449d3f1 100755
--- a/bin/ansible
+++ b/bin/ansible
@@ -129,7 +129,7 @@ if __name__ == '__main__':
             log_only = False
         else:
             display.display("to see the full traceback, use -vvv")
-            log_only = True 
+            log_only = True
         display.display(u"the full traceback was:\n\n%s" % to_text(traceback.format_exc()), log_only=log_only)
         exit_code = 250
     finally:
diff --git a/contrib/inventory/docker.py b/contrib/inventory/docker.py
index 3ea18314435..31a18b84064 100755
--- a/contrib/inventory/docker.py
+++ b/contrib/inventory/docker.py
@@ -444,7 +444,7 @@ class AnsibleDockerClient(Client):
             tls_config = TLSConfig(**kwargs)
             return tls_config
         except TLSParameterError as exc:
-           self.fail("TLS config error: %s" % exc)
+            self.fail("TLS config error: %s" % exc)
 
     def _get_connect_params(self):
         auth = self.auth_params
diff --git a/examples/scripts/uptime.py b/examples/scripts/uptime.py
index 6357d5a75e9..be533527faf 100755
--- a/examples/scripts/uptime.py
+++ b/examples/scripts/uptime.py
@@ -47,7 +47,7 @@ def main():
     variable_manager.set_inventory(inventory)
 
     # create play with tasks
-    play_source =  dict(
+    play_source = dict(
             name = "Ansible Play",
             hosts = host_list,
             gather_facts = 'no',
diff --git a/lib/ansible/inventory/group.py b/lib/ansible/inventory/group.py
index 63c297aaa47..a6ab35c3e9f 100644
--- a/lib/ansible/inventory/group.py
+++ b/lib/ansible/inventory/group.py
@@ -83,7 +83,7 @@ class Group:
             raise Exception("can't add group to itself")
 
         # don't add if it's already there
-        if not group in self.child_groups:
+        if group not in self.child_groups:
             self.child_groups.append(group)
 
             # update the depth of the child
@@ -94,7 +94,7 @@ class Group:
 
             # now add self to child's parent_groups list, but only if there
             # isn't already a group with the same name
-            if not self.name in [g.name for g in group.parent_groups]:
+            if self.name not in [g.name for g in group.parent_groups]:
                 group.parent_groups.append(self)
 
             self.clear_hosts_cache()