Object of type set is not JSON serializable

[buran]

in curls you have a dict, not set
so

#!/usr/bin/env python3
..
with open('/tmp/config.json') as json_file1:
    data1 = json.load(json_file1)
    for domaine, value in data1.items():
        for name, value2 in value.items():
            service = data1[domaine][name]['service']
            threshold1, threshold2 = data1[domaine][name]['threshold'] # unpack the list
            try:
                url = "https://localhost:5665/v1/objects/hosts/"
                request_url = url+hostname
                headers = {
                    'Accept': 'application/json',
                    'X-HTTP-Method-Override': 'PUT'
                }
                data = {
                    "templates": service,
                    "attrs": {
                                "address":"BLABLA",
                                "zone":"BLIBLI",
                                "vars": {'threshold1':threshold1, 'threshold2':threshold2}
                    }
                }
                r = requests.post(request_url,
                    headers=headers,
                    verify=False,
                    auth=('admin', 'XXXXXXXXXXXXXXXXXX'),
                        data=json.dumps(data))

note that in curl threshold1 and threshold2 are integers, you will read them as str, so you may need to explicitly convert them