Return JSON object with a "header"

I have an API, where I need to return data. I want to make a "header", where I specify the amount of tutors, the call returned. My current function looks like this:

def get_matching_tutors(filters):
formatted_tutors = []

matching_tutors = [tutor for tutor in tutor_list if matches_all_filters(filters, tutor)]

matching_tutors = sorted(matching_tutors, key = lambda i: i['hours'])
matching_tutors = sorted(matching_tutors, key = lambda i: i['tutor_amount_of_students'])

for tutor in matching_tutors:
    data = {
        "first_name": tutor["first_name"],
        "last_name": tutor["last_name"],
        "mobile_phone": tutor["mobile_phone"],
        "email": tutor["email"],
        "status": tutor["status"],
        "more_courses": tutor["more_courses"],
        "hours": tutor["hours"],
        "tutor_amount_of_students": tutor["tutor_amount_of_students"],
        "teachworks": tutor["teachworks"]
    }
    formatted_tutors.append(data)
return jsonify(formatted_tutors)

This is an example, of the response.

[
{
    "email": "TEST@test.dk",
    "first_name": "TEST",
    "hours": 0,
    "last_name": "TEST",
    "mobile_phone": "",
    "more_courses": "Yes",
    "status": "Active",
    "teachworks": "https://toptutors.teachworks.com/employees/114106",
    "tutor_amount_of_students": 3
},
{
    "email": "Jeppe6721@gmail.com",
    "first_name": "Jeppe",
    "hours": 28.0,
    "last_name": "Vestergaard Nielsen",
    "mobile_phone": "51781003",
    "more_courses": "Yes",
    "status": "Active",
    "teachworks": "https://toptutors.teachworks.com/employees/133813",
    "tutor_amount_of_students": 3
},
{
    "email": "sidra200265@gmail.com",
    "first_name": "Sidra",
    "hours": 52.0,
    "last_name": "Ahmed",
    "mobile_phone": "52111671",
    "more_courses": "Yes",
    "status": "Active",
    "teachworks": "https://toptutors.teachworks.com/employees/133751",
    "tutor_amount_of_students": 3
}

]

I’d like to add a header, that specifies the amount of tutors/arrays that the response returned. So it would be at the top of the json response, "amount_of_tutors": (Amount)

>Solution :

The simplest way is to add this line after the loop and change the return statement:

my_response = {'amount_of_tutors':len(formatted_tutors), 'tutors':formatted_tutors}
return jsonify(my_response)

But it is doubtful whether there is benefit having that extra key.