code: def test_electrocardiogram():
      # Test shape, dtype and stats of signal
      ecg = electrocardiogram()
      assert ecg.dtype == float
      assert_equal(ecg.shape, (108000,))
      assert_almost_equal(ecg.mean(), -0.16510875)
      assert_almost_equal(ecg.std(), 0.5992473991177294)
  
file_path: catboost/contrib/python/scipy/py2/scipy/misc/tests/test_common.py
imports: from __future__ import division, print_function, absolute_import
  import pytest
  from numpy.testing import assert_equal, assert_allclose, assert_almost_equal
  from scipy._lib._numpy_compat import suppress_warnings
  from scipy.misc import pade, logsumexp, face, ascent, electrocardiogram
  from scipy.special import logsumexp
label_desc: Use image node_id 5 for calling a global function with example usage: test_electrocardiogram() without return types