code: def all_values(request, tmpdir_factory):
      all_values = set()
      for i in range(10000):
          all_values.add("guid_" + str(i))
      return all_values
  
imports: import pytest
  import numpy
  from pyspark.sql import SparkSession
  from pyspark.sql.types import IntegerType
  from petastorm import make_reader
  from petastorm.codecs import ScalarCodec
  from petastorm.etl.dataset_metadata import materialize_dataset
  from petastorm.predicates import in_set, in_intersection, in_negate, in_reduce, in_pseudorandom_split, in_lambda
  from petastorm.tests.test_common import TestSchema
  from petastorm.unischema import dict_to_spark_row, Unischema, UnischemaField
label_desc: Use image node_id 1 for calling a global function with example usage: all_values(request, tmpdir_factory) and returns: all_values