Pub/Sub: System test failures on Python 2.7 (invalid syntax) #7841
Description
tests/unit/pubsub_v1/subscriber/test_subscriber_client.py:18: in <module>
from google.cloud.pubsub_v1 import subscriber
google/cloud/pubsub_v1/__init__.py:19: in <module>
from google.cloud.pubsub_v1 import subscriber
google/cloud/pubsub_v1/subscriber/__init__.py:17: in <module>
from google.cloud.pubsub_v1.subscriber.client import Client
google/cloud/pubsub_v1/subscriber/client.py:30: in <module>
from google.cloud.pubsub_v1.subscriber._protocol import streaming_pull_manager
E File "/tmpfs/src/github/google-cloud-python/pubsub/google/cloud/pubsub_v1/subscriber/_protocol/streaming_pull_manager.py", line 198
E print(f"{messages_percent}, {bytes_percent}")
E ^
E SyntaxError: invalid syntax
Looks like streaming_pull_manager.py is using a format string, which isn't valid Python 2.7 syntax. Needs to use "{}, {}".format(...), instead.