code: def test_pandas_nofreq(self, reset_randomstate):
      # issue #3503
      nobs = 100
      dta = pd.Series(
          [x % 3 for x in range(nobs)] + np.random.randn(nobs)
      )
      res_np = seasonal_decompose(dta.values, period=3)
      res = seasonal_decompose(dta, period=3)
  
      atol = 1e-8
      rtol = 1e-10
      assert_allclose(
          res.seasonal.values.squeeze(),
          res_np.seasonal,
          atol=atol,
          rtol=rtol,
      )
      assert_allclose(
          res.trend.values.squeeze(), res_np.trend, atol=atol, rtol=rtol
      )
      assert_allclose(
          res.resid.values.squeeze(), res_np.resid, atol=atol, rtol=rtol
      )
  
imports: from statsmodels.compat.pandas import MONTH_END, QUARTER_END, YEAR_END
  import numpy
  from numpy.testing import assert_allclose, assert_almost_equal, assert_equal, assert_raises
  import pandas
  import pytest
  from statsmodels.tsa.seasonal import seasonal_decompose
label_desc: Use image node_id 4 for calling the TestDecompose obj's underlying member method code with example usage: obj.test_pandas_nofreq(reset_randomstate) without return types