code: def test_round_frac_just_works(x):
      # It works.
      cut(x, 2)
  
imports: import numpy
  import pytest
  import pandas
  from pandas import Categorical, DataFrame, DatetimeIndex, Index, Interval, IntervalIndex, Series, TimedeltaIndex, Timestamp, cut, date_range, interval_range, isna, qcut, timedelta_range, to_datetime
  import pandas._testing
  from pandas.api.types import CategoricalDtype
  import pandas.core.reshape.tile
label_desc: Use image node_id 23 for calling a global function with example usage: test_round_frac_just_works(x) without return types