json模块中的Object_hook似乎没有像预期的那样工作

import json

def hook(dct):
    # 自定义处理逻辑
    return dct

json_str = '{"key": "value"}'
data = json.loads(json_str, object_hook=hook)

import json

def hook(dct):
    if 'key' in dct:
        dct['key'] = dct['key'].upper()
    return dct

json_str = '{"key": "value"}'
data = json.loads(json_str, object_hook=hook)

import json

def hook(dct):
    return dct

# 错误的JSON字符串
json_str = '{"key": "value"'  # 缺少闭合的大括号
try:
    data = json.loads(json_str, object_hook=hook)
except json.JSONDecodeError as e:
    print(f"JSON解析错误: {e}")

import json

def deep_hook(dct):
    for key, value in dct.items():
        if isinstance(value, dict):
            dct[key] = deep_hook(value)
    # 自定义处理逻辑
    return dct

json_str = '{"key": {"nested_key": "nested_value"}}'
data = json.loads(json_str, object_hook=deep_hook)

import json

class MyClass:
    def __init__(self, key, value):
        self.key = key
        self.value = value

def object_hook(dct):
    return MyClass(dct['key'], dct['value'])

json_str = '{"key": "value"}'
obj = json.loads(json_str, object_hook=object_hook)