code: def test_repr():
      df = pd.DataFrame({"x": list(range(100))})
      ddf = dd.from_pandas(df, 3)
  
      for x in [ddf, ddf.index, ddf.x]:
          assert type(x).__name__ in repr(x)
          assert str(x.npartitions) in repr(x)
  
imports: from __future__ import annotations
  from textwrap import dedent
  import numpy
  import pandas
  import pytest
  import dask.array
  import dask.dataframe
  from dask.dataframe.utils import get_string_dtype, pyarrow_strings_enabled
  from dask.utils import maybe_pluralize
label_desc: Use image node_id 3 for calling a global function with example usage: test_repr() without return types