Auto-update dependencies. [(#922)](GoogleCloudPlatform/python-docs-samples#922)

* Auto-update dependencies.

* Fix pubsub iam samples

Author: dpebot

samples/snippets/iam.py

@@ -67,9 +67,11 @@ def set_topic_policy(topic_name):
     policy = topic.get_iam_policy()
 
     # Add all users as viewers.
-    policy.viewers.add(policy.all_users())
-    # Add a group as editors.
-    policy.editors.add(policy.group('[email protected]'))
+    policy['roles/pubsub.viewer'] = [policy.all_users()]
+    # Add a group as publisherss.
+    publishers = policy.get('roles/pubsub.publisher', [])
+    publishers.append(policy.group('[email protected]'))
+    policy['roles/pubsub.publisher'] = publishers
 
     # Set the policy
     topic.set_iam_policy(policy)
@@ -85,9 +87,11 @@ def set_subscription_policy(topic_name, subscription_name):
     policy = subscription.get_iam_policy()
 
     # Add all users as viewers.
-    policy.viewers.add(policy.all_users())
-    # Add a group as editors.
-    policy.editors.add(policy.group('[email protected]'))
+    policy['roles/viewer'] = [policy.all_users()]
+    # # Add a group as editors.
+    editors = policy.get('roles/editor', [])
+    editors.append(policy.group('[email protected]'))
+    policy['roles/editor'] = editors
 
     # Set the policy
     subscription.set_iam_policy(policy)

samples/snippets/iam_test.py

@@ -67,7 +67,7 @@ def test_set_topic_policy(test_topic):
 
     policy = test_topic.get_iam_policy()
     assert policy.viewers
-    assert policy.editors
+    assert policy['roles/pubsub.publisher']
 
 
 def test_set_subscription_policy(test_subscription):

samples/snippets/requirements.txt

@@ -1 +1 @@
-google-cloud-pubsub==0.24.0
+google-cloud-pubsub==0.25.0