text: import numpy as np
  
  
  def load_mesh():
      import csv
      f = open('tet.csv')
      reader = csv.reader(f, delimiter=' ')
      _eind = []
      for line in reader:
          _eind += [int(x) for x in line]
      _nv = max(_eind) + 1
      _ne = len(_eind) // 4
      return (
          _nv, _ne,
          np.asarray(np.arange(0, len(_eind) + 4, 4), dtype='int32'),
          np.asarray(_eind, dtype='int32')
      )
  