code: def _normalize_angle(x, zero_centered=True):
      """Normalize angles.
  
      Normalize angles in radians to [-pi, pi) or [0, 2 * pi) according to `zero_centered`.
      """
      if zero_centered:
          return (x + np.pi) % (2 * np.pi) - np.pi
      else:
          return x % (2 * np.pi)
  
imports: import warnings
  import numpy
  from scipy.fftpack import fft
  from scipy.optimize import brentq
  from scipy.signal import convolve, convolve2d, gaussian
  from scipy.sparse import coo_matrix
  from scipy.special import ive
  from ..utils import _cov, _dot, _stack, conditional_jit
label_desc: Use image node_id 24 for calling a global function with example usage: _normalize_angle(x, zero_centered) and returns: unknown, unknown