code: def pytest_many_prefixes_case():
      cases, ids = _format_test_cases(BASIC_DATA, meta=BASIC_METADATA)
      many_prefixes = []
      many_prefixes_expected = {}
      for s3root, [prefix], files in cases:
          many_prefixes.append(prefix)
          many_prefixes_expected.update(files)
      # add many prefixes cases
      ids.append("many_prefixes")
      cases.append((S3ROOT, many_prefixes, many_prefixes_expected))
      return {"argvalues": cases, "ids": ids}
  
imports: import os
  import sys
  import zlib
  import json
  from uuid import uuid4
  from hashlib import sha1
  from collections import namedtuple
  from metaflow.plugins.datatools.s3 import S3PutObject
  from metaflow.util import to_fileobj, to_bytes, url_quote
  import numpy
  from ..None import s3client, S3ROOT
label_desc: Use image node_id 9 for calling a global function with example usage: pytest_many_prefixes_case() and returns: dict