python怎么把字符串类json转成字典dict类型变量？

eval 也行，但建议用 json.loads

import json
json_str = '{"firstname":"David","surname":"John","age":32, "hobbies": [0, 2, 7]}'
json_obj = json.loads(json_str)

my_texts = '{"firstname":"David","surname":"John","age":32, "hobbies": [0, 2, 7]}'
my_dict = eval(my_texts)

eval是python内自带的函数

json.loads()

eval 危险性函数，不建议使用。建议 json.loads