class_docstr: Tests for ExtensionArray.__getitem__.
code: def test_loc_frame(self, data):
      df = pd.DataFrame(
          {"A": data, "B": np.arange(len(data), dtype="int64")}
      )
      expected = pd.DataFrame({"A": data[:4]})
  
      # slice -> frame
      result = df.loc[:3, ["A"]]
      tm.assert_frame_equal(result, expected)
  
      # sequence -> frame
      result = df.loc[[0, 1, 2, 3], ["A"]]
      tm.assert_frame_equal(result, expected)
  
      expected = pd.Series(data[:4], name="A")
  
      # slice -> series
      result = df.loc[:3, "A"]
      tm.assert_series_equal(result, expected)
  
      # sequence -> series
      result = df.loc[:3, "A"]
      tm.assert_series_equal(result, expected)
  
imports: import numpy
  import pytest
  import pandas
  import pandas._testing
label_desc: Use image node_id 5 for calling the BaseGetitemTests obj's underlying member method code with example usage: obj.test_loc_frame(data) without return types