text: import numpy as np
  from . import procar
  
  
  class BandStructure:
      def __init__(self, structure, filename='PROCAR'):
          self.structure = structure
          rcell = self.structure.lattice.reciprocal().cell
          print(rcell)
          self.procarFile = procar.ProcarParser()
          self.procarFile.readFile(procar=filename, permissive=False, recLattice=rcell)
  
          self.data = procar.ProcarSelect(self.procarFile, deepCopy=True)
  
      def simple_bands(self):
          self.data.selectIspin([0])
          self.data.selectAtoms([-1])
          self.data.selectOrbital([-1])
  
          fermi = 0
  
          bands = (self.data.bands.transpose() - np.array(fermi)).transpose()
  
          plot = procar.ProcarPlot(bands, self.data.spd, self.data.kpoints)
  
          fig, ax = plot.scatterPlot()
          ax.set_ylabel(r"Energy [eV]")
  
          return fig, ax
  