code: def from_veto_def(cls, veto):
          
          name = '%s:%s' % (veto.ifo, veto.name)
          try:
              name += ':%d' % int(veto.version)
          except TypeError:
              pass
          if veto.end_time == 0:
              veto.end_time = +inf
          known = Segment(veto.start_time, veto.end_time)
          pad = (veto.start_pad, veto.end_pad)
          return cls(name=name, known=[known], category=veto.category,
                     description=veto.comment, padding=pad)
docs: Define a `DataQualityFlag` from a `VetoDef`
  
          Parameters
          ----------
          veto : :class:`~ligo.lw.lsctables.VetoDef`
              veto definition to convert from