code: def average_power(signal, fs):
      """Computes the average power of the signal.
  
      Feature computational cost: 1
  
      Parameters
      ----------
      signal : nd-array
          Signal from which average power is computed
      fs : float
          Sampling frequency
  
      Returns
      -------
      float
          Average power
  
      """
      time = compute_time(signal, fs)
  
      return np.sum(np.array(signal) ** 2) / (time[-1] - time[0])
  
imports: import scipy.signal
  from tsfel.feature_extraction.features_utils import *
label_desc: Use image node_id 16 for calling a global function with example usage: average_power(signal, fs) and returns: unknown