code: def load_notes(filename):
      """
      Load the notes from the given file, one note per line of format
      'onset_time' 'note_number' ['duration' ['velocity']].
  
      Parameters
      ----------
      filename: str or file handle
          File to load the notes from.
  
      Returns
      -------
      numpy array
          Notes.
  
      """
      return np.loadtxt(filename, ndmin=2)
  
imports: from __future__ import absolute_import, division, print_function
  import contextlib
  import io
  import numpy
  from .audio import load_audio_file
  from .midi import load_midi, write_midi
  from ..utils import suppress_warnings, string_types
label_desc: Use image node_id 8 for calling a global function with example usage: load_notes(filename) and returns: np