Realization of topic function

I believe everyone knows the topic , For example, the topic of Weibo , Click the topic to show all posts under the topic

 

 

The main technology stack is to replace the topic with a hyperlink tag that can be clicked

The following code shows （python,tornado Framework implementations ）>>>>>>>>

#  Regular substitution 
    async def change_object(self, sublist, stype):

        re_dict = {

            "talk": {"re": r'#([\w]+)#', "model": TalkModel, "column": "TalkModel.name.in_(items)",
                     "getkey": "myid.name", "replace": "#{}#", "a": "<a href='/talk?tid={}'>#{}#</a>"}

        }

        myre = re_dict[stype]["re"]

        for x in sublist:

            #  Replace topic 

            items_dict = {}
            items = re.findall(myre, x["content"])

            ids = await self.database.execute(
                re_dict[stype]["model"].select().where(eval(re_dict[stype]["column"])))

            for myid in ids:
                items_dict[eval(re_dict[stype]["getkey"])] = myid.id

            for item in items:
                try:
                    x["content"] = x["content"].replace(re_dict[stype]["replace"].format(item),
                                                        re_dict[stype]["a"].format(items_dict[item], item))
                except Exception as e:
                    print(str(e))
                    pass

        return sublist

This code , Using the idea of packaging , Encapsulate the replacement as a method , In order to call , Reduce code reuse ！

After replacement, the front end will use the obtained replacement content v-html Convert to label , Click the hyperlink to get the specified tag id, To get all the content under this tab ！

There are many similar ones that need to be replaced ,@ The same principle applies to friends , Interested partners can try