Python 重命名字典的键
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Renaming the keys of a dictionary
提问by BarryPye
How to change a key in a Python dictionary?
如何更改 Python 字典中的键？
A routine returns a dictionary. Everything is OK with the dictionary except a couple keys need to be renamed. This code below copies the dictionary entry (key=value) into a new entry with the desired key and then deletes the old entry. Is there a more Pythonic way, perhaps without duplicating the value?
例程返回字典。除了需要重命名几个键之外，字典一切正常。下面的代码将字典条目（键=值）复制到具有所需键的新条目中，然后删除旧条目。有没有更 Pythonic 的方式，也许不复制价值？
my_dict = some_library.some_method(scan)
my_dict['qVec'] = my_dict['Q']
my_dict['rVec'] = my_dict['R']
del my_dict['Q'], my_dict['R']
return my_dict
采纳答案by Bhargav Rao
dictkeys are immutable. That means that they cannot be changed. You can read more from the docs
dict键是不可变的。这意味着它们无法更改。您可以从文档中阅读更多内容
dictionaries are indexed by keys, which can be any immutable type
字典由键索引，键可以是任何不可变类型
Here is a workaround using dict.pop
这是使用的解决方法 dict.pop
>>> d = {1:'a',2:'b'}
>>> d[3] = d.pop(1)
>>> d
{2: 'b', 3: 'a'}
