code: def client(decoded_r):
      decoded_r.flushdb()
      return decoded_r
  
imports: import math
  import time
  from time import sleep
  import pytest
  import redis
  from .conftest import assert_resp_response, is_resp2_connection, skip_ifmodversion_lt
label_desc: Use image node_id 1 for calling a global function with example usage: client(decoded_r) and returns: decoded_r