code: def test_subscription_copy(self):
      consumer = KafkaConsumer("foo", api_version=(0, 10))
      sub = consumer.subscription()
      assert sub is not consumer.subscription()
      assert sub == set(["foo"])
      sub.add("fizz")
      assert consumer.subscription() == set(["foo"])
  
file_path: kafka-python/test/test_consumer.py
imports: import pytest
  from kafka import KafkaConsumer
  from kafka.errors import KafkaConfigurationError
label_desc: Use image node_id 4 for calling the TestKafkaConsumer obj's underlying member method code with example usage: obj.test_subscription_copy() without return types