code: def test_repr_unsortable(self):
      # columns are not sortable
  
      unsortable = DataFrame(
          {
              "foo": [1] * 50,
              datetime.today(): [1] * 50,
              "bar": ["bar"] * 50,
              datetime.today() + timedelta(1): ["bar"] * 50,
          },
          index=np.arange(50),
      )
      repr(unsortable)
  
imports: from datetime import datetime, timedelta
  from io import StringIO
  import numpy
  import pytest
  from pandas._config import using_pyarrow_string_dtype
  from pandas import NA, Categorical, CategoricalIndex, DataFrame, IntervalIndex, MultiIndex, NaT, PeriodIndex, Series, Timestamp, date_range, option_context, period_range
  import pandas._testing
label_desc: Use image node_id 17 for calling the TestDataFrameRepr obj's underlying member method code with example usage: obj.test_repr_unsortable() without return types