code: def read_file(path):
      with open(path) as f:
          return f.read()
  
imports: import cgi
  import os
  import pathlib
  import subprocess
  import tempfile
  from collections import namedtuple
  import pytest
  import requests
  import mlflow
  from mlflow import MlflowClient
  from mlflow.artifacts import download_artifacts
  from tests.helper_functions import LOCALHOST, get_safe_port
  from tests.tracking.integration_test_utils import _await_server_up_or_die
label_desc: Use image node_id 4 for calling a global function with example usage: read_file(path) and returns: f