code: def test_series_neg():
      arr = np.random.random(100) * 100
      sr = Series(arr)
      np.testing.assert_equal((-sr).to_numpy(), -arr)
  
file_path: cudf/python/cudf/cudf/tests/test_unaops.py
imports: import itertools
  import operator
  import re
  import numpy
  import pandas
  import pytest
  import cudf
  from cudf import Series
  from cudf.testing import _utils
label_desc: Use image node_id 3 for calling a global function with example usage: test_series_neg() without return types