code: def test_select_dtypes_typecodes(self):
      # GH 11990
      df = DataFrame(np.random.default_rng(2).random((5, 3)))
      FLOAT_TYPES = list(np.typecodes["AllFloat"])
      tm.assert_frame_equal(df.select_dtypes(FLOAT_TYPES), df)
  
imports: import numpy
  import pytest
  from pandas.core.dtypes.dtypes import ExtensionDtype
  import pandas
  from pandas import DataFrame, Timestamp
  import pandas._testing
  from pandas.core.arrays import ExtensionArray
label_desc: Use image node_id 16 for calling the TestSelectDtypes obj's underlying member method code with example usage: obj.test_select_dtypes_typecodes() without return types