def head(self, msgid_article=None):
args = None<EOL>if msgid_article is not None:<EOL><INDENT>args = utils.unparse_msgid_article(msgid_article)<EOL><DEDENT>code, message = self.command("<STR_LIT>", args)<EOL>if code != <NUM_LIT>:<EOL><INDENT>raise NNTPReplyError(code, message)<EOL><DEDENT>return utils.parse_headers(self.info_gen(code, message))<EOL>
HEAD command.