code: def test_empty_dataframe():
      schema = pa.schema([("col1", pa.int8())])
      df = pa.table([[]], schema=schema)
      dfi = df.__dataframe__()
      assert pi.from_dataframe(dfi) == df
  
imports: from datetime import datetime
  import numpy
  import pyarrow
  from pyarrow.vendored.version import Version
  import pytest
  import pyarrow.interchange
  from pyarrow.interchange.column import _PyArrowColumn, ColumnNullType, DtypeKind
  from pyarrow.interchange.from_dataframe import _from_dataframe
label_desc: Use image node_id 18 for calling a global function with example usage: test_empty_dataframe() without return types