词典中的嵌套词典

Question

我在Python中有这样的字典：

{cat1:whatever, cat2:again, cat3: here we go}

我想将其设为嵌套字典，以使其为{here we go: {whatever:again}}

我已经尝试了很多东西，但是我似乎无法理解。

Answer 1

这是实现它的方法。

>>> nested_dict = {}
>>> nested_dict['d1'] = {}
>>> nested_dict['d1']['key1'] = 'value1'
>>> nested_dict
{'d1': {'key1': 'value1'}}
>>> nested_dict['d2'] = {}
>>> nested_dict['d2']['key2'] = 'value2'
>>> nested_dict
{'d2': {'key2': 'value2'}, 'd1': {'key1': 'value1'}}