code: def test_serialize_packed_dataframe_list():
      np.random.seed(0)
  
      df = DataFrame()
      df["keys"] = Series(list([i, i + 1, i + 2] for i in range(10)))
      df["vals"] = np.random.random(len(df))
  
      check_packed_serialized_equality(df)
  
imports: import pickle
  import sys
  import numpy
  import pandas
  from cudf import DataFrame, GenericIndex, Series
  from cudf._lib.copying import pack, unpack
  from cudf.testing._utils import assert_eq
label_desc: Use image node_id 24 for calling a global function with example usage: test_serialize_packed_dataframe_list() without return types