使用python类替换嵌套字典中的值

class NestedDict:
    def replace_value(self, nested_dict, old_value, new_value):
        for key, value in nested_dict.items():
            if isinstance(value, dict):
                self.replace_value(value, old_value, new_value)
            elif value == old_value:
                nested_dict[key] = new_value

nested_dict = {
    'key1': 'value1',
    'key2': {
        'key3': 'value2',
        'key4': {
            'key5': 'value3'
        }
    }
}

nested_dict_replacer = NestedDict()
nested_dict_replacer.replace_value(nested_dict, 'value2', 'new_value')

print(nested_dict)

{
    'key1': 'value1',
    'key2': {
        'key3': 'new_value',
        'key4': {
            'key5': 'value3'
        }
    }
}