python实现计算资源图标crc值的方法

  def _get_iconcrc(self, file_path):     """     Generates the crc32 hash of the icon of the file.     @return: str, the str value of the file's icon     """     iconData = ""      mype = pefile.PE(file_path)     if hasattr(mype, "DIRECTORY_ENTRY_RESOURCE"):       resIcons = filter(lambda x: x.id==pefile.RESOURCE_TYPE['RT_ICON'], mype.DIRECTORY_ENTRY_RESOURCE.entries)       if len(resIcons)>0:         resIcons = resIcons[0]         if hasattr(resIcons, "directory"):           for resId in resIcons.directory.entries:             if hasattr(resId, 'directory'):               for resLang in resId.directory.entries:                 iconData += mype.get_data(resLang.data.struct.OffsetToData, resLang.data.struct.Size)          if not iconData:       print "not iconData"       return None     else:       return self._crc32(iconData)