code: def compute(self, failures):
      self.calls += 1
      return 0
  
file_path: redis-py/tests/test_asyncio/test_retry.py
imports: import pytest
  from redis.asyncio import Redis
  from redis.asyncio.connection import Connection, UnixDomainSocketConnection
  from redis.asyncio.retry import Retry
  from redis.backoff import AbstractBackoff, ExponentialBackoff, NoBackoff
  from redis.exceptions import ConnectionError, TimeoutError
label_desc: Use image node_id 3 for calling the BackoffMock obj's underlying member method code with example usage: obj.compute(failures) and returns: int