code: def get_cont_lf0(f0, frame_period=5.0):
      uv, cont_f0_lpf = convert_continuos_f0(f0)
      # cont_f0_lpf = low_pass_filter(cont_f0_lpf, int(1.0 / (frame_period * 0.001)), cutoff=20)
      cont_lf0_lpf = np.log(cont_f0_lpf)
      return uv, cont_lf0_lpf
  
file_path: PaddleHub/modules/audio/svs/diffsinger/utils/cwt.py
imports: import librosa
  import numpy
  from pycwt import wavelet
  from scipy.interpolate import interp1d
label_desc: Use image node_id 3 for calling a global function with example usage: get_cont_lf0(f0, frame_period) and returns: uv,  cont_lf0_lpf