code: def get_hashed_filename(name, file, suffix=None):
      
      basename, hash, ext = split_filename(name)
      file.seek(0)
      new_hash = '.%s' % md5(file.read()).hexdigest()[:12]
      if suffix is not None:
          basename = '%s_%s' % (basename, suffix)
      return '%s%s%s' % (basename, new_hash, ext)
docs: Gets a new filename for the provided file of the form
      "oldfilename.hash.ext". If the old filename looks like it already contains a
      hash, it will be replaced (so you don't end up with names like
      "pic.hash.hash.ext")