code: def test_calc_corr_small_numbers(self):
      # GH: 37452
      df = DataFrame(
          {
              "A": [1.0e-20, 2.0e-20, 3.0e-20],
              "B": [1.0e-20, 2.0e-20, 3.0e-20],
          }
      )
      result = df.corr()
      expected = DataFrame(
          {"A": [1.0, 1.0], "B": [1.0, 1.0]}, index=["A", "B"]
      )
      tm.assert_frame_equal(result, expected)
  
imports: import numpy
  import pytest
  import pandas.util._test_decorators
  import pandas
  from pandas import DataFrame, Index, Series, date_range, isna
  import pandas._testing
label_desc: Use image node_id 12 for calling the TestDataFrameCorr obj's underlying member method code with example usage: obj.test_calc_corr_small_numbers() without return types