def get_categories(self):
res = self._get(<EOL>'<STR_LIT>',<EOL>result_processor=lambda x: x['<STR_LIT>']<EOL>)<EOL>return res<EOL>
获取微信门店类目表

详情请参考
http://mp.weixin.qq.com/wiki/16/8f182af4d8dcea02c56506306bdb2f4c.html

:return: 门店类目表