code: def test_sosfilt_zi():
      sos_f32 = np.array([[4, 5, 6, 1, 2, 3]], dtype=np.float32)
      assert_(sosfilt_zi(sos_f32).dtype == np.float32)
  
file_path: catboost/contrib/python/scipy/py3/scipy/signal/tests/test_result_type.py
imports: import numpy
  from numpy.testing import assert_
  import pytest
  from scipy.signal import decimate, lfilter_zi, lfiltic, sos2tf, sosfilt_zi
label_desc: Use image node_id 5 for calling a global function with example usage: test_sosfilt_zi() without return types