old_contents: #!/usr/bin/env python
  
  from __future__ import division
  
  '''
  Created on Nov 14, 2011
  '''
  
  __author__="Shyue Ping Ong"
  __copyright__ = "Copyright 2011, The Materials Project"
  __version__ = "0.1"
  __maintainer__ = "Shyue Ping Ong"
  __email__ = "shyue@mit.edu"
  __date__ = "Nov 14, 2011"
  
  import argparse
  
  from pymatgen.io.vaspio import Poscar
  from pymatgen.io.cifio import CifParser, CifWriter
  
  parser = argparse.ArgumentParser(description='''Convenient file format convertor. 
  Author: Shyue Ping Ong
  Version: 1.0
  Last updated: Oct 26 2011''')
  parser.add_argument('input_file', metavar='input file', type=str, nargs = 1, help='input file')
  parser.add_argument('output_file', metavar='output file', type=str, nargs = 1, help='output file')
  
  parser.add_argument('-c', '--conversion', dest='conversion', type=str, nargs = 1, choices=['poscar2cif','cif2poscar'], default='poscar2cif', help='Format conversion desired. ')
  
  args = parser.parse_args()
  try:
      if args.conversion == 'poscar2cif':
          p = Poscar.from_file(args.input_file[0])
          w = CifWriter(p.struct)
          w.write_file(args.output_file[0])
      else:
          r = CifParser(args.input_file[0])
          p = Poscar(r.get_structures()[0])
          p.write_file(args.output_file[0])
  except:
      print "Error converting file. Are they in the right format?"
      
      
new_contents: #!/usr/bin/env python
  
  from __future__ import division
  
  '''
  Created on Nov 14, 2011
  '''
  
  __author__="Shyue Ping Ong"
  __copyright__ = "Copyright 2011, The Materials Project"
  __version__ = "0.1"
  __maintainer__ = "Shyue Ping Ong"
  __email__ = "shyue@mit.edu"
  __date__ = "Nov 14, 2011"
  
  import argparse
  
  from pymatgen.io.vaspio import Poscar
  from pymatgen.io.cifio import CifParser, CifWriter
  
  parser = argparse.ArgumentParser(description='''Convenient file format convertor. 
  Author: Shyue Ping Ong
  Version: 1.0
  Last updated: Oct 26 2011''')
  parser.add_argument('input_file', metavar='input file', type=str, nargs = 1, help='input file')
  parser.add_argument('output_file', metavar='output file', type=str, nargs = 1, help='output file')
  
  parser.add_argument('-c', '--conversion', dest='conversion', type=str, nargs = 1, choices=['poscar2cif','cif2poscar'], default='poscar2cif', help='Format conversion desired. ')
  
  args = parser.parse_args()
  try:
      if args.conversion[0] == 'poscar2cif':
          p = Poscar.from_file(args.input_file[0])
          w = CifWriter(p.struct)
          w.write_file(args.output_file[0])
      else:
          r = CifParser(args.input_file[0])
          p = Poscar(r.get_structures()[0])
          p.write_file(args.output_file[0])
  except Exception as ex:
      print "Error converting file. Are they in the right format?"
      print str(ex)
      
subject: Fix bug in format convertor script.