new_contents: #!/usr/bin/env python
  
  '''
  Created on Nov 12, 2011
  '''
  
  __author__="Shyue Ping Ong"
  __copyright__ = "Copyright 2011, The Materials Project"
  __version__ = "0.1"
  __maintainer__ = "Shyue Ping Ong"
  __email__ = "shyue@mit.edu"
  __date__ = "Nov 12, 2011"
  
  import sys
  import itertools
  from pymatgen.io.vaspio import Incar
  from pymatgen.util.string_utils import str_aligned
  
  filepath1 = sys.argv[1]
  filepath2 = sys.argv[2]
  incar1 = Incar.from_file(filepath1)
  incar2 = Incar.from_file(filepath2)        
  
  def format_lists(v):
      if isinstance(v, (tuple, list)):
          return " ".join([str(i) + "*" + str(len(tuple(group))) for (i,group) in itertools.groupby(v)])
      return v
  
  d = incar1.diff(incar2)
  output = [['SAME PARAMS','', '']]
  output.append(['---------------','', ''])
  output.extend([(k,format_lists(v),format_lists(v)) for k,v in d['Same'].items() if k != "SYSTEM"])
  output.append(['','', ''])
  output.append(['DIFFERENT PARAM','', ''])
  output.append(['---------------','', ''])
  output.extend([(k,format_lists(v['INCAR1']),format_lists(v['INCAR2'])) for k, v in d['Different'].items() if k != "SYSTEM"])
  print str_aligned(output, ['', filepath1, filepath2])
subject: Add a script for easy diffing of two Incars.