How do I jsonify a list in Flask

Question

Currently Flask would raise an error when jsonifying a list   I know there could be security reasons https   github com mitsuhiko flask issues 170  but I still would like to have a way to return a JSON list like the following           a   1   b   2         a   5   b   10      instead of     results           a   1   b   2         a   5   b   10       on responding to a application json request  How can I return a JSON list in Flask using Jsonify

User · Answer

You can t but you can do it anyway like this  I needed this for jQuery-File-Upload  import json   get this object from flask import Response   example data       js        name    filename   size    st st size             url    url for  show   filename filename      then do this     return Response json dumps js    mimetype  application json

User · Answer

If you are searching literally the way to return a JSON list in flask and you are completly sure that your variable is a list then the easy way is  where bin is a list of 1 s and 0 s       return jsonify   ans  bin    201   Finally  in your client you will obtain something like     ans     0 0  0 0  1 0  1 0  0 0

User · Answer

Solved  no fuss  You can be lazy and use jsonify  all you need to do is pass in items  your list      Take a look here for the solution  https   github com mitsuhiko flask issues 510

User · Answer

jsonify prevents you from doing this in Flask 0 10 and lower for security reasons   To do it anyway  just use json dumps in the Python standard library   http   docs python org library json html json dumps

User · Answer

This is working for me  Which version of Flask are you using   from flask import jsonify        app route   test json   def test json        list                   a   1   b   2                 a   5   b   10                   return jsonify results   list

User · Answer

josonify works  but if you intend to just pass an array without the  results  key  you can use json library from python  The following conversion works for me     import json    app route   test json    def test json     list               a   1   b   2             a   5   b   10            return json dumps list

User · Answer

A list in a flask can be easily jsonify using jsonify like   from flask import Flask jsonify app   Flask   name     tasks                    id  1           task   this is first task                        id  2           task   this is another task            app route   app-name api v0 1 tasks  methods   GET    def get tasks        return jsonify   tasks  tasks     will return the json  if   name         main          app run debug   True

User · Answer

Flask s jsonify   method now serializes top-level arrays as of this commit  available in Flask 0 11 onwards    For convenience  you can either pass in a Python list  jsonify  1 2 3   Or pass in a series of args  jsonify 1 2 3   Both will be serialized to a JSON top-level array   1 2 3   Details here  http   flask pocoo org docs dev api  flask json jsonify

[json] How do I `jsonify` a list in Flask?

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