code: def test_isetitem_dimension_mismatch(self):
      # GH#51701
      df = DataFrame({"a": [1, 2], "b": [3, 4], "c": [5, 6]})
      value = df.copy()
      with pytest.raises(
          ValueError, match="Got 2 positions but value has 3 columns"
      ):
          df.isetitem([1, 2], value)
  
      value = df.copy()
      with pytest.raises(
          ValueError, match="Got 2 positions but value has 1 columns"
      ):
          df.isetitem([1, 2], value[["a"]])
  
imports: import pytest
  from pandas import DataFrame, Series
  import pandas._testing
label_desc: Use image node_id 3 for calling the TestDataFrameSetItem obj's underlying member method code with example usage: obj.test_isetitem_dimension_mismatch() without return types