Fix detection of existing tags when updating a function. Tags key is not present if there are no existing tags

Scot Kronenfeld · Scot Kronenfeld · commit 7d2c2b44bb2a · 2018-03-06T16:50:55.000-06:00
diff --git a/aws_lambda/aws_lambda.py b/aws_lambda/aws_lambda.py
@@ -640,7 +640,7 @@ def update_function(
             key: str(value)
             for key, value in cfg.get('tags').items()
         }
-        if tags != existing_cfg['Tags']:
+        if tags != existing_cfg.get('Tags'):
             client.untag_resource(Resource=ret['FunctionArn'],
                                   TagKeys=list(existing_cfg['Tags'].keys()))
             client.tag_resource(Resource=ret['FunctionArn'], Tags=tags)

Original file line number	Diff line number	Diff line change
`@@ -640,7 +640,7 @@ def update_function(`
`640`	`640`	`key: str(value)`
`641`	`641`	`for key, value in cfg.get('tags').items()`
`642`	`642`	`}`
`643`		`- if tags != existing_cfg['Tags']:`
	`643`	`+ if tags != existing_cfg.get('Tags'):`
`644`	`644`	`client.untag_resource(Resource=ret['FunctionArn'],`
`645`	`645`	`TagKeys=list(existing_cfg['Tags'].keys()))`
`646`	`646`	`client.tag_resource(Resource=ret['FunctionArn'], Tags=tags)`