unpack dict

[menator01]

Giving the following example:
How can one unpack the dict

Current output:

Output:
Class: Wizard
NAME Ralph
AGE 20
SPELLS {'fireball': 10, 'firestorm': 15}

NAME George
AGE 20
SPELLS {'firestorm': 15, 'meteor': 30}

Target output

Output:
Class: Wizard
NAME Ralph
AGE 20
SPELLS: fireball: 10, firestorm: 15

NAME George
AGE 20
SPELLS: firestorm: 15, meteor: 30

character.json

{
    "wizard": [
        {
            "name": "Ralph",
            "age": 20,
            "spells": {"fireball": 10, "firestorm": 15}
        },

        {
            "name": "George",
            "age": 20,
            "spells": {"firestorm": 15, "meteor": 30}
        }
    ]
}

import json
file = "character.json"

with open(file, 'r') as rfile:
    character = json.load(rfile)

for character_class, data in character.items():
    print(f'Class: {character_class.title()}')
    for stats in data:
        for key, value in stats.items():
            print(key.upper(), value)
        print()