# -*- coding: Windows-1251 -*-  '''  rename_to_exiftime.py    Rename JPEG files according to EXIF-date using PIL    If global variable CREATE_HARDLINK is set, script creates Windows (XP) batch file   for creating hardlink version of source files    Author: Denis Barmenkov <denis.barmenkov@gmail.com>    Modified by: Jorge Barnaby <jorge.barnaby@gmail.com>  Improved rename process on duplicates    Copyright: this code is free, but if you want to use it,              please keep this multiline comment along with function source.              Thank you.    2009-02-10 18:14   '''    import Image    import os  import re  import sys  import time    CREATE_HARDLINK=0    def extract_jpeg_exif_time(jpegfn):      if not os.path.isfile(jpegfn):          return None      try:          im = Image.open(jpegfn)          if hasattr(im, '_getexif'):              exifdata = im._getexif()              ctime = exifdata[0x9003]              #print ctime              return ctime      except:           _type, value, traceback = sys.exc_info()          print "Error:\n%r", value        return None    def get_exif_prefix(jpegfn):      ctime = extract_jpeg_exif_time(jpegfn)      if ctime is None:          return None      ctime = ctime.replace(':', '')      ctime = re.sub('[^\d]+', '_', ctime)      return ctime    def rename_jpeg_file(fn):      if not os.path.isfile(fn):          return 0      ext = os.path.splitext(fn)[1].lower()      if ext not in ['.jpg', '.jpeg', '.jfif', '.nef', '.png']:          return 0      path, base = os.path.split(fn)      #print base # status      prefix = get_exif_prefix(fn)      if prefix is None:          print '%s could not be renamed' % (base)          return 0      if base.startswith(prefix):          print '%s file already renamed' % (base)          return 0 # file already renamed to this prefix        exists = True      index = 0      while exists:          if index == 0:              new_name = prefix + ext # + '_' + base          else:              new_name = prefix + '_' + str(index) + ext          new_full_name = os.path.join(path, new_name)          exists = os.path.isfile(new_full_name)          index = index + 1        if CREATE_HARDLINK:          f = open('CREATE_HARDLINK.cmd', 'a')          f.write('fsutil hardlink create "%s" "%s"\n' % (new_full_name, fn))          f.close()      else:          try:              os.rename(fn, new_full_name)              print '%s renamed to %s' % (base, new_name)           except:              print 'ERROR rename %s --> %s' % (fn, new_full_name)              return 0        return 1    def rename_jpeg_files_in_dir(dn):      names = os.listdir(dn)      count=0      for n in names:          file_path = os.path.join(dn, n)          count += rename_jpeg_file(file_path)      return count    if __name__=='__main__':      try:          path = sys.argv[1]      except IndexError:          print '''Usage:        rename_to_exiftime.py  filename.[jpeg|jpg|jfif]    or      rename_to_exiftime.py  dirname  '''          sys.exit(1)        if os.path.isfile(path):          rename_jpeg_file(path)      elif os.path.isdir(path):          count = rename_jpeg_files_in_dir(path)          print '%d file(s) renamed.' % count      else:          print 'ERROR: path not found: %s' % path