code: def assert_df_unique_dtype_cols(data):
      cdf = cudf.DataFrame(data=data)
      assert_from_dataframe_equals(cdf, allow_copy=False)
      assert_from_dataframe_equals(cdf, allow_copy=True)
  
imports: from typing import Any, Tuple
  import cupy
  import pandas
  import pytest
  import cudf
  from cudf.core._compat import PANDAS_GE_150
  from cudf.core.buffer import as_buffer
  from cudf.core.column import as_column, build_column
  from cudf.core.df_protocol import DataFrameObject, _CuDFBuffer, _CuDFColumn, _DtypeKind, _MaskKind, _protocol_buffer_to_cudf_buffer, from_dataframe, protocol_dtype_to_cupy_dtype
  from cudf.testing._utils import assert_eq
label_desc: Use image node_id 8 for calling a global function with example usage: assert_df_unique_dtype_cols(data) without return types