如何在python中创建子字典来覆盖超级字典？

super_dict = {
    'key1': 'value1',
    'key2': 'value2',
    'key3': 'value3'
}

sub_dict = {
    'key2': 'new_value2',
    'key4': 'value4'
}

super_dict.update(sub_dict)

print(super_dict)

{
    'key1': 'value1',
    'key2': 'new_value2',
    'key3': 'value3',
    'key4': 'value4'
}