如果键等于给定的键，如何删除嵌套字典中的所有键

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

nested_dict = {
    'key1': 'value1',
    'key2': {
        'key3': 'value3',
        'key4': 'value4'
    },
    'key5': [
        {'key6': 'value6'},
        {'key7': 'value7'}
    ]
}

delete_nested_dict_keys(nested_dict, 'key4')
print(nested_dict)

{
    'key1': 'value1',
    'key2': {
        'key3': 'value3'
    },
    'key5': [
        {'key6': 'value6'},
        {'key7': 'value7'}
    ]
}