code: def test_exponents_without_eng_prefix(self):
      formatter = EngFormatter(accuracy=4, use_eng_prefix=False)
      f = np.pi
      in_out = [
          (f * 10**-24, " 3.1416E-24"),
          (f * 10**-23, " 31.4159E-24"),
          (f * 10**-22, " 314.1593E-24"),
          (f * 10**-21, " 3.1416E-21"),
          (f * 10**-20, " 31.4159E-21"),
          (f * 10**-19, " 314.1593E-21"),
          (f * 10**-18, " 3.1416E-18"),
          (f * 10**-17, " 31.4159E-18"),
          (f * 10**-16, " 314.1593E-18"),
          (f * 10**-15, " 3.1416E-15"),
          (f * 10**-14, " 31.4159E-15"),
          (f * 10**-13, " 314.1593E-15"),
          (f * 10**-12, " 3.1416E-12"),
          (f * 10**-11, " 31.4159E-12"),
          (f * 10**-10, " 314.1593E-12"),
          (f * 10**-9, " 3.1416E-09"),
          (f * 10**-8, " 31.4159E-09"),
          (f * 10**-7, " 314.1593E-09"),
          (f * 10**-6, " 3.1416E-06"),
          (f * 10**-5, " 31.4159E-06"),
          (f * 10**-4, " 314.1593E-06"),
          (f * 10**-3, " 3.1416E-03"),
          (f * 10**-2, " 31.4159E-03"),
          (f * 10**-1, " 314.1593E-03"),
          (f * 10**0, " 3.1416E+00"),
          (f * 10**1, " 31.4159E+00"),
          (f * 10**2, " 314.1593E+00"),
          (f * 10**3, " 3.1416E+03"),
          (f * 10**4, " 31.4159E+03"),
          (f * 10**5, " 314.1593E+03"),
          (f * 10**6, " 3.1416E+06"),
          (f * 10**7, " 31.4159E+06"),
          (f * 10**8, " 314.1593E+06"),
          (f * 10**9, " 3.1416E+09"),
          (f * 10**10, " 31.4159E+09"),
          (f * 10**11, " 314.1593E+09"),
          (f * 10**12, " 3.1416E+12"),
          (f * 10**13, " 31.4159E+12"),
          (f * 10**14, " 314.1593E+12"),
          (f * 10**15, " 3.1416E+15"),
          (f * 10**16, " 31.4159E+15"),
          (f * 10**17, " 314.1593E+15"),
          (f * 10**18, " 3.1416E+18"),
          (f * 10**19, " 31.4159E+18"),
          (f * 10**20, " 314.1593E+18"),
          (f * 10**21, " 3.1416E+21"),
          (f * 10**22, " 31.4159E+21"),
          (f * 10**23, " 314.1593E+21"),
          (f * 10**24, " 3.1416E+24"),
          (f * 10**25, " 31.4159E+24"),
          (f * 10**26, " 314.1593E+24"),
      ]
      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 6 for calling the TestEngFormatter obj's underlying member method code with example usage: obj.test_exponents_without_eng_prefix() without return types