def get_face(<EOL>self, person_group_id, person_id, persisted_face_id, custom_headers=None, raw=False, **operation_config):
<EOL>url = self.get_face.metadata['<STR_LIT:url>']<EOL>path_format_arguments = {<EOL>'<STR_LIT>': self._serialize.url("<STR_LIT>", self.config.endpoint, '<STR_LIT:str>', skip_quote=True),<EOL>'<STR_LIT>': self._serialize.url("<STR_LIT>", person_group_id, '<STR_LIT:str>', max_length=<NUM_LIT:64>, pattern=r'<STR_LIT>'),<EOL>'<STR_LIT>': self._serialize.url("<STR_LIT>", person_id, '<STR_LIT:str>'),<EOL>'<STR_LIT>': self._serialize.url("<STR_LIT>", persisted_face_id, '<STR_LIT:str>')<EOL>}<EOL>url = self._client.format_url(url, **path_format_arguments)<EOL>query_parameters = {}<EOL>header_parameters = {}<EOL>header_parameters['<STR_LIT>'] = '<STR_LIT:application/json>'<EOL>if custom_headers:<EOL><INDENT>header_parameters.update(custom_headers)<EOL><DEDENT>request = self._client.get(url, query_parameters, header_parameters)<EOL>response = self._client.send(request, stream=False, **operation_config)<EOL>if response.status_code not in [<NUM_LIT:200>]:<EOL><INDENT>raise models.APIErrorException(self._deserialize, response)<EOL><DEDENT>deserialized = None<EOL>if response.status_code == <NUM_LIT:200>:<EOL><INDENT>deserialized = self._deserialize('<STR_LIT>', response)<EOL><DEDENT>if raw:<EOL><INDENT>client_raw_response = ClientRawResponse(deserialized, response)<EOL>return client_raw_response<EOL><DEDENT>return deserialized<EOL>
Retrieve information about a persisted face (specified by
        persistedFaceId, personId and its belonging personGroupId).

        :param person_group_id: Id referencing a particular person group.
        :type person_group_id: str
        :param person_id: Id referencing a particular person.
        :type person_id: str
        :param persisted_face_id: Id referencing a particular persistedFaceId
         of an existing face.
        :type persisted_face_id: str
        :param dict custom_headers: headers that will be added to the request
        :param bool raw: returns the direct response alongside the
         deserialized response
        :param operation_config: :ref:`Operation configuration
         overrides<msrest:optionsforoperations>`.
        :return: PersistedFace or ClientRawResponse if raw=true
        :rtype: ~azure.cognitiveservices.vision.face.models.PersistedFace or
         ~msrest.pipeline.ClientRawResponse
        :raises:
         :class:`APIErrorException<azure.cognitiveservices.vision.face.models.APIErrorException>`