模块：json（格式转换）

import json


date = "{'a':'A','b':'B'}"
a1 = json.loads(date)
print(a1[1])
    # 字符串转json


d = {
    'first_name': 'Guido',
    'second_name': 'Rossum',
    'titles': ['BDFL', 'Developer'],
}
print(json.dumps(d))
'{"first_name": "Guido", "last_name": "Rossum", "titles": ["BDFL", "Developer"]}'
    # 字典转json