Pythonic更新json dict中存储的多个值的方法

我有一个json文件，其中存储了一个值字典。我知道如何单独修改键的值，但我想知道如何使用另一个字典更新json文件中的字典

json文件名为'dummy.json'

{
    "my_settings": {
        "volts": "21.8",
        "power": "25.8",
        "current": "1.0",
        "time_on": 88888.0,
        "time_off": "1.5",
        "week": 444,
        "site": 4,
        "op": "ABC",
        "test": "Ubik",
        "repeats": 7,
        "freq": "6000",
        "SN": "3",
        "Vpeak": 27.5,
        "Vrms": 26.8,
        "Foobar": "True"
    }
}

代码

json_file = 'dummy.json'

def modify_json_file(json_file, settings_dict, settings_dict_key, new_dict_value):
    with open(json_file, "r") as input_json:
        json_data = json.load(input_json)
        dict_to_modify = json_data[settings_dict]
    dict_to_modify[settings_dict_key] = new_dict_value
    with open(json_file, "w") as input_json:
        json_data[settings_dict]=dict_to_modify
        json_data = json.dump(json_data, input_json, indent = 4)

modify_json_file(json_file, "my_settings", "week", 444) # works

我想用来更新dummy.json的新字典

new_data = {"volts": 20.0,
        "power": 11.1,
        "current": 2.2}

所需输出

{
    "my_settings": {
        "volts": 20.0,
        "power": 11.1,
        "current": 2.2,
        "time_on": 88888.0,
        "time_off": "1.5",
        "week": 444,
        "site": 4,
        "op": "ABC",
        "test": "Ubik",
        "repeats": 7,
        "freq": "6000",
        "SN": "3",
        "Vpeak": 27.5,
        "Vrms": 26.8,
        "Foobar": "True"
    }
}

代码：

结果:

{
    "my_settings": {
        "volts": 20.0,
        "power": 11.1,
        "current": 2.2,
        "time_on": 88888.0,
        "time_off": "1.5",
        "week": 444,
        "site": 4,
        "op": "ABC",
        "test": "Ubik",
        "repeats": 7,
        "freq": "6000",
        "SN": "3",
        "Vpeak": 27.5,
        "Vrms": 26.8,
        "Foobar": "True"
    }
}

---

update（dict_设置）将使用dict_设置中的所有值对json_数据字典进行udpate。然后把它写回文件。如果我理解了这个问题，我想它会满足你的要求。试试

。更新（new\u dict）

这会有用的。我不确定我把它放在哪里了，我会试试一些东西。太好了，谢谢

{
    "my_settings": {
        "volts": 20.0,
        "power": 11.1,
        "current": 2.2,
        "time_on": 88888.0,
        "time_off": "1.5",
        "week": 444,
        "site": 4,
        "op": "ABC",
        "test": "Ubik",
        "repeats": 7,
        "freq": "6000",
        "SN": "3",
        "Vpeak": 27.5,
        "Vrms": 26.8,
        "Foobar": "True"
    }
}