code: def iter_graphs():
      root = os.path.join(os.path.dirname(__file__), "graphs")
      for graphfile in os.listdir(root):
          if graphfile.endswith(".json") and not graphfile[0] == ".":
              with open(os.path.join(root, graphfile)) as f:
                  yield json.load(f)
  
imports: import sys
  import os
  import json
  import uuid
  import glob
  import importlib
  import tempfile
  import shutil
  import subprocess
  from multiprocessing import Pool
  from metaflow._vendor import click
  from metaflow_test import MetaflowTest
  from metaflow_test.formatter import FlowFormatter
label_desc: Use image node_id 1 for calling a global function with example usage: iter_graphs() without return types