def _build_msg_content(self, msgtype='<STR_LIT:text>', **kwargs):
data = {'<STR_LIT>': msgtype}<EOL>if msgtype == '<STR_LIT:text>':<EOL><INDENT>data[msgtype] = {'<STR_LIT:content>': kwargs.get('<STR_LIT:content>')}<EOL><DEDENT>elif msgtype == '<STR_LIT:image>' or msgtype == '<STR_LIT>' or msgtype == '<STR_LIT:file>':<EOL><INDENT>data[msgtype] = {'<STR_LIT>': kwargs.get('<STR_LIT>')}<EOL><DEDENT>elif msgtype == '<STR_LIT>':<EOL><INDENT>data[msgtype] = {<EOL>'<STR_LIT>': kwargs.get('<STR_LIT>'),<EOL>'<STR_LIT:title>': kwargs.get('<STR_LIT:title>'),<EOL>'<STR_LIT:description>': kwargs.get('<STR_LIT:description>')<EOL>}<EOL><DEDENT>elif msgtype == '<STR_LIT>':<EOL><INDENT>data[msgtype] = {<EOL>'<STR_LIT:title>': kwargs.get('<STR_LIT:title>'),<EOL>'<STR_LIT:description>': kwargs.get('<STR_LIT:description>'),<EOL>'<STR_LIT:url>': kwargs.get('<STR_LIT:url>'),<EOL>'<STR_LIT>': kwargs.get('<STR_LIT>'),<EOL>}<EOL><DEDENT>elif msgtype == '<STR_LIT>':<EOL><INDENT>data[msgtype] = kwargs<EOL><DEDENT>elif msgtype == '<STR_LIT>':<EOL><INDENT>data[msgtype] = kwargs<EOL><DEDENT>elif msgtype == '<STR_LIT>':<EOL><INDENT>data[msgtype] = kwargs<EOL><DEDENT>else:<EOL><INDENT>raise TypeError('<STR_LIT>' % msgtype)<EOL><DEDENT>return data<EOL>
构造消息内容

:param content: 消息内容，最长不超过2048个字节
:param msgtype: 消息类型，可以为text/image/voice/video/file/textcard/news/mpnews/markdown
:param kwargs: 具体消息类型的扩展参数
:return: