new_contents: import os
  import codecs
  import re
  
  EXT = "usfm"
  SOURCEDIR = "."
  PROJECT = "OA-GUJ"
  bk = {"GEN":1, "EXO":2, "LEV":3, "NUM":4, "DEU":5, "JOS":6, "JDG":7, "RUT":8, "1SA":9, "2SA":10, "1KI":11, "2KI":12, "1CH":13, "2CH":14, "EZR":15, "NEH":16, "EST":17, "JOB":18, "PSA":19, "PRO":20, "ECC":21, "SNG":22, "ISA":23, "JER":24, "LAM":25, "EZE":26, "DAN":27, "HOS":28, "JOL":29, "AMO":30, "OBA":31, "JON":32, "MIC":33, "NAM":34, "HAB":35, "ZEP":36, "HAG":37, "ZEC":38, "MAL":39, "MAT":40, "MRK":41, "LUK":42, "JHN":43, "ACT":44, "ROM":45, "1CO":46, "2CO":47, "GAL":48, "EPH":49, "PHP":50, "COL":51, "1TH":52, "2TH":53, "1TI":54, "2TI":55, "TIT":56, "PHM":57, "HEB":58, "JAS":59, "1PE":60, "2PE":61, "1JN":62, "2JN":63, "3JN":64, "JUD":65, "REV": 66}
  
  fileList = os.listdir(SOURCEDIR)
  
  for fil in fileList:
      b = fil.split(".")
      if(b[1].lower() == EXT):
          f = codecs.open(fil, mode = 'r', encoding = 'utf-8')
          fc = f.read()
          f.close()
  
          try:
              bkID = re.findall("\\id ([A-Z0-9]{3})", fc)[0]
              fName = str(bk[bkID]+1).zfill(2) + "_" + bkID + PROJECT + "." + EXT
          except:
              fName=fil
          o = codecs.open(fName, mode='w', encoding='utf-8')
          o.write(fc)
          o.close()
  
subject: Change the name of usfm file according to ID