code: def test_ricker_length(self, length, xp, scp):
      return scp.signal.ricker(length, 1.0)
  
file_path: cupy/tests/cupyx_tests/scipy_tests/signal_tests/test_wavelets.py
imports: import pytest
  from cupy import testing
  import cupyx.scipy.signal
label_desc: Use image node_id 9 for calling the TestWavelets obj's underlying member method code with example usage: obj.test_ricker_length(length, xp, scp) and returns: scp