code: def test_hyperbolic_at_zero(self):
      w = waveforms.chirp(
          t=0, f0=10.0, f1=1.0, t1=1.0, method="hyperbolic"
      )
      assert_almost_equal(w, 1.0)
  
imports: from __future__ import division, print_function, absolute_import
  import numpy
  from numpy.testing import assert_almost_equal, assert_equal, assert_, assert_allclose, assert_array_equal
  from pytest import raises
  import scipy.signal.waveforms
label_desc: Use image node_id 12 for calling the TestChirp obj's underlying member method code with example usage: obj.test_hyperbolic_at_zero() without return types