删除嵌套字典中的键

def delete_key(nested_dict, key):
    if isinstance(nested_dict, dict):
        for k, v in list(nested_dict.items()):
            if k == key:
                del nested_dict[k]
            elif isinstance(v, dict):
                delete_key(v, key)
            elif isinstance(v, list):
                for item in v:
                    delete_key(item, key)
    elif isinstance(nested_dict, list):
        for item in nested_dict:
            delete_key(item, key)

nested_dict = {
    'key1': 'value1',
    'key2': {
        'nested_key1': 'nested_value1',
        'nested_key2': 'nested_value2'
    },
    'key3': [
        {'nested_key3': 'nested_value3'},
        {'nested_key4': 'nested_value4'}
    ]
}

delete_key(nested_dict, 'nested_key2')

print(nested_dict)

{
    'key1': 'value1',
    'key2': {},
    'key3': [
        {'nested_key3': 'nested_value3'},
        {'nested_key4': 'nested_value4'}
    ]
}