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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def saveThumbnail(self,fileName,filePath):
 """ URL to the thumbnail used for the item """

        if self._thumbnail is None:
            self.__init()
        param_dict = {}
        if  self._thumbnail is not None:
            imgUrl = self.root + "/info/" + self._thumbnail
            onlineFileName, file_ext = splitext(self._thumbnail)
            fileNameSafe = "".join(x for x in fileName if x.isalnum()) + file_ext
            result = self._get(url=imgUrl,
                               param_dict=param_dict,
                               securityHandler=self._securityHandler,
                               proxy_url=self._proxy_url,
                               proxy_port=self._proxy_port,
                               out_folder=filePath,
                               file_name=fileNameSafe)
            return result
        else:
            return None