从字典列表中提取数据

Question

Hi I would like to convert a list of dictionaries into a single dictionary of some of the items in the list: I have:

>>> print(dct_lst)
[{'id': 456, 'name': 'bar'}, {'id': 789, 'name': 'baz'}, {'id': 123, 'name': 'foo'}]

I want:

dct={'bar':None
     'baz':None
     'foof':None}

and I've tried (among other combinations):

>>> for i in dct_lst['name']:
...     btns[i]=None
... 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: list indices must be integers, not str

How do I get what I need?

Answer 1

Consider utilizing a dict comprehension :

>>> dct_lst = [{'id': 456, 'name': 'bar'}, {'id': 789, 'name': 'baz'}, {'id': 123, 'name': 'foo'}]
>>> dct = {d['name']: None for d in dct_lst if 'name' in d}
>>> dct
{'baz': None, 'foo': None, 'bar': None}