python实现计算资源图标crc值的方法，pythoncrc

  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)