code: def client():
      return docker.from_env()
  
file_path: fiber/tests/test_popen.py
imports: import multiprocessing
  import io
  import re
  import time
  import logging
  import socket
  import fiber
  import fiber.popen_fiber_spawn
  import docker
  import pytest
label_desc: Use image node_id 1 for calling a global function with example usage: client() and returns: docker