>>> json = {'●': '●', '○': [{'name': 'A', '1': 11, '2': 22}, {'name': 'B', '3': 33, '4': 44}, {'name': 'C', '5': 55, '6': 66}]}
>>> all = {x['name']:x for x in json['○']}
>>> all
{'A': {'name': 'A', '1': 11, '2': 22}, 'B': {'name': 'B', '3': 33, '4': 44}, 'C': {'name': 'C', '5': 55, '6': 66}}
>>>