code: def test_exponents_with_eng_prefix(self):
      formatter = EngFormatter(accuracy=3, use_eng_prefix=True)
      f = np.sqrt(2)
      in_out = [
          (f * 10**-24, " 1.414y"),
          (f * 10**-23, " 14.142y"),
          (f * 10**-22, " 141.421y"),
          (f * 10**-21, " 1.414z"),
          (f * 10**-20, " 14.142z"),
          (f * 10**-19, " 141.421z"),
          (f * 10**-18, " 1.414a"),
          (f * 10**-17, " 14.142a"),
          (f * 10**-16, " 141.421a"),
          (f * 10**-15, " 1.414f"),
          (f * 10**-14, " 14.142f"),
          (f * 10**-13, " 141.421f"),
          (f * 10**-12, " 1.414p"),
          (f * 10**-11, " 14.142p"),
          (f * 10**-10, " 141.421p"),
          (f * 10**-9, " 1.414n"),
          (f * 10**-8, " 14.142n"),
          (f * 10**-7, " 141.421n"),
          (f * 10**-6, " 1.414u"),
          (f * 10**-5, " 14.142u"),
          (f * 10**-4, " 141.421u"),
          (f * 10**-3, " 1.414m"),
          (f * 10**-2, " 14.142m"),
          (f * 10**-1, " 141.421m"),
          (f * 10**0, " 1.414"),
          (f * 10**1, " 14.142"),
          (f * 10**2, " 141.421"),
          (f * 10**3, " 1.414k"),
          (f * 10**4, " 14.142k"),
          (f * 10**5, " 141.421k"),
          (f * 10**6, " 1.414M"),
          (f * 10**7, " 14.142M"),
          (f * 10**8, " 141.421M"),
          (f * 10**9, " 1.414G"),
          (f * 10**10, " 14.142G"),
          (f * 10**11, " 141.421G"),
          (f * 10**12, " 1.414T"),
          (f * 10**13, " 14.142T"),
          (f * 10**14, " 141.421T"),
          (f * 10**15, " 1.414P"),
          (f * 10**16, " 14.142P"),
          (f * 10**17, " 141.421P"),
          (f * 10**18, " 1.414E"),
          (f * 10**19, " 14.142E"),
          (f * 10**20, " 141.421E"),
          (f * 10**21, " 1.414Z"),
          (f * 10**22, " 14.142Z"),
          (f * 10**23, " 141.421Z"),
          (f * 10**24, " 1.414Y"),
          (f * 10**25, " 14.142Y"),
          (f * 10**26, " 141.421Y"),
      ]
      self.compare_all(formatter, in_out)
  
file_path: pandas/pandas/tests/io/formats/test_eng_formatting.py
imports: import numpy
  import pytest
  from pandas import DataFrame, reset_option, set_eng_float_format
  from pandas.io.formats.format import EngFormatter
label_desc: Use image node_id 5 for calling the TestEngFormatter obj's underlying member method code with example usage: obj.test_exponents_with_eng_prefix() without return types