code: def _compute_normalized_phase(data):
      """Compute normalized phase angles.
  
      Parameters
      ----------
      data : ndarray, shape (n_epochs, n_sources, n_times)
          The data to compute the phase angles for.
  
      Returns
      -------
      phase_angles : ndarray, shape (n_epochs, n_sources, n_times)
          The normalized phase angles.
      """
      return (np.angle(hilbert(data)) + np.pi) / (2 * np.pi)
  
imports: import math
  import numpy
  from scipy.signal import hilbert
  from scipy.special import logsumexp
label_desc: Use image node_id 1 for calling a global function with example usage: _compute_normalized_phase(data) and returns: unknown