text: 
  from ..core import Writable
  
  __all__ = ['Sig2WanInput']
  
  class Sig2WanInput(Writable):
  
      def __init__(self, prefix, nbnd, nspin=1, eqp=1, sigma_file='sigma_hp.log', prefix_gw=None):
  
          self.prefix = prefix
          self.prefix_gw = prefix_gw if prefix_gw else prefix + '_GW'
          self.nspin = nspin
          self.nbnd = nbnd
          self.eqp = eqp
          self.sigma_file = sigma_file
  
      def __str__(self):
          return """
  {sigma:<30} ! Sigma output file to read k-points, eigenvalues and symmetries from
  {nspin:<30} ! spin component to read from sigma_hp.log file
  {eqp:<30} ! set to 0 or 1 to read eqp0 or eqp1 from sigma_hp.log file
  {nnkp:<30} ! Wannier90 input file to read k-points from
  {eig:<30} ! file where the output of sig2wan is written
  {nbnd:<30} ! number of bands to write out
  """.format(sigma=self.sigma_file, nnkp=self.prefix+'.nnkp', eig=self.prefix_gw+'.eig',
             nspin=self.nspin, eqp=self.eqp, nbnd=self.nbnd).lstrip()
  
  
  
  