Jellyfin

import requests
import json
import time

# create a formatted string of the Python JSON object
def jprint(obj):
    text = json.dumps(obj, sort_keys=True, indent=4)
    print(text)

ip = "***********"
user_id = "***************"
token = "**************"
music_folder_id = "**************"

# get all items
url_get_all = 'http://'+ ip+ ':8096/Items'

params_get_all = {
    'parentId': music_folder_id,
    'recursive': True}

headers = {
    'Authorization' : 'MediaBrowser Token="'+ token+'"',
    'Content-Type': 'application/json'}

response_get = requests.get(url_get_all, params=params_get_all, headers=headers)
json_result = response_get.json()

url_get_item = 'http://'+ ip+ ':8096/Users/'+ user_id+ '/Items'

# gt all items list (not all the fields are received)
for item in json_result['Items']:
    if 'IsFolder' in item:
        if item['IsFolder']:
            # get individual item (to get all fields)
            response_get_individual = requests.get(url_get_item+'/'+item['Id'], params=[], headers=headers)
            if response_get_individual.status_code == 200:
                json_result_individual = response_get_individual.json()
                json_result_individual['OfficialRating'] = "Tous Publics"
                # send item back
                url_post = url_get_all+'/'+item['Id']
                response_post = requests.post(url_post, params=[], data=json.dumps(json_result_individual), headers=headers)
                if response_post.status_code != 204:
                    print('---------------')
                    print('Id = '+ item['Id'])
                    print('Name = '+ item['Name'])
                    print(response_post.status_code)
                    print(response_post.reason)
                time.sleep(0.2)