How to read metadata from a given URL and save it as a json file with key_value pairs?

I have defined a URL in my python codes and I need to read it and save it in a json file then save them in a list or dictionary. In my codes I read and print them. Also, I would like to know is there any issue in my codes such as post method or read key value pairs from the URL?

from flask import Flask, jsonify, abort, make_response
from flask_restful import Resource, Api
import requests, json
import urllib.request as request

app = Flask(__name__)
api = Api(app)

data = "given_URL" 
myjsondata = {}

@app.route('/my_folder/', methods=["POST"])
@app.error

class read(Resource):
    
    def read_data(self):
        with request.urllib.urlopen(metadata) as response:
            if response.getcode() == 200:
                source = response.read()
                data = json.loads(source)
                for i in data:
                    for key, value in i.iteritems():
                        if key == 'uid':
                            print key, value
                            myjsondata[key]=value

                return jsonify(myjsondata)

            else:
                abort(make_response(jsonify(404, massage = "No request found"),400))
            
api.add_resource(read, '/my_folder')

if __name__ == '__main__':
    app.run(debug=True)

Answer

Read the metadata. Arrange keys and values in your way to make dictionary.

#Save extracted content to dictionary/list
myjsondata={}
for i in data:
    for key, value in i.iteritems():
        if key == 'uid':
           print key, value
           myjsondata[key]=value

#Save your dictionary content to json file
with open('saved_json_file_1.json', 'w') as saveFile:
    saveFile.write(json.dumps())