code: def reshape_peaks_for_visualization(peaks):
      """Reshape peaks for visualization.
  
      Reshape and convert to float32 a set of peaks for visualisation with mrtrix
      or the fibernavigator.
  
      Parameters
      ----------
      peaks: nd array (..., N, 3) or PeaksAndMetrics object
          The peaks to be reshaped and converted to float32.
  
      Returns
      -------
      peaks : nd array (..., 3*N)
      """
      if isinstance(peaks, PeaksAndMetrics):
          peaks = peaks.peak_dirs
  
      return peaks.reshape(np.append(peaks.shape[:-2], -1)).astype(
          "float32"
      )
  
imports: import tempfile
  from multiprocessing import Pool
  from itertools import repeat
  from os import path
  import numpy
  import scipy.optimize
  from dipy.reconst.odf import gfa
  from dipy.reconst.recspeed import local_maxima, remove_similar_vertices, search_descending
  from dipy.core.sphere import Sphere
  from dipy.data import default_sphere
  from dipy.core.ndindex import ndindex
  from dipy.reconst.shm import sh_to_sf_matrix
  from dipy.reconst.eudx_direction_getter import EuDXDirectionGetter
  from dipy.utils.multiproc import determine_num_processes
  from dipy.utils.deprecator import deprecated_params
label_desc: Use image node_id 7 for calling a global function with example usage: reshape_peaks_for_visualization(peaks) and returns: peaks