Python flask data to JS

2. The first thing to know is the data format used for background and front-end interaction.
   Generally choose JSON, because the perfect fit with JS.
   
   
4. Data returned in the background is serialized
   

   Returning serialized data in the view method of the/homepagerecommend route

   
   Dict = {"A": 1, "B": 2}
   1) Import JSON json.dumps (DICT) 2) from Flask import jsonifyjsonify (dict)         #在调用jsonfiy sometimes error, because the Jsonify object must be Dict

   　The main difference between the two serialization methods is that the jsonify format is more aesthetically pleasing

6. Using Jquary to deserialize JSON on the front end
   

   $.getjson ('/homepagerecommend'                , function (data) {                    // returned from flask                      alert (data.a)                     //Browser popup Displays the value of dict["A" returned by the backend, this time is 1
               }
             ) The Getjson function has three parameters //The first is the URL of the data returned bythe back end//The second is to be returned to the server is optional//The third is the deserialized data for the fetch function to proceed with the operation

8. Then you can use JS to do what you want to do with the data.

Summary: Flask Background to the front-end JS data, need to pay attention to serialization and deserialization

Python flask data to JS