code: def test_total_seconds_scalar(self):
      # see gh-10939
      rng = Timedelta("1 days, 10:11:12.100123456")
      expt = 1 * 86400 + 10 * 3600 + 11 * 60 + 12 + 100123456.0 / 1e9
      tm.assert_almost_equal(rng.total_seconds(), expt)
  
      rng = Timedelta(np.nan)
      assert np.isnan(rng.total_seconds())
  
imports: from datetime import timedelta
  import sys
  from hypothesis import given, strategies
  import numpy
  import pytest
  from pandas._libs import lib
  from pandas._libs.tslibs import NaT, iNaT
  from pandas._libs.tslibs.dtypes import NpyDatetimeUnit
  from pandas.errors import OutOfBoundsTimedelta
  from pandas import Timedelta, to_timedelta
  import pandas._testing
label_desc: Use image node_id 2 for calling the TestTimedeltas obj's underlying member method code with example usage: obj.test_total_seconds_scalar() without return types